CN114278908A

CN114278908A - Lamp fitting

Info

Publication number: CN114278908A
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: 2022-04-05
Anticipated expiration: 2041-12-25
Also published as: CN114278908B

Abstract

The invention relates to a lamp, which comprises a shell, a lamp holder and a lamp holder, wherein 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 part 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 close to the light source part is provided with a light-permeable diffuse reflection area. Through the light-permeable diffuse reflection area arranged on the transparent medium, the light with large angle generated by the light source part can be reflected to the light-permeable diffuse reflection area when being irradiated to the reflecting layer so as to be subjected to diffuse reflection, or part of the light passing through the light-permeable diffuse reflection area is subjected to total reflection in the transparent medium until the emergent angle of the light is converted into a small angle, and the light can be emitted to the outside of the transparent medium. The light emitted by the lamp is concentrated and uniform, and the lamp efficiency is high.

Description

Lamp fitting

Technical Field

The invention relates to the technical field of lighting, 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 is the ratio of the luminous flux value emitted by the lamp measured under the specified conditions to the sum of the luminous flux measured values emitted by all 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 emitting from the lamp.

For the lamp with the light-emitting member positioned in the structural cavity of the shell, part of light rays incident to the lamp structure can be absorbed, so that the emergent luminous flux of the lamp is reduced, and the efficiency of the lamp is reduced. In traditional technique, generally will set up anti-light paper with the structure intracavity of shell for the light that originally incides the structure chamber reflects, thereby improves lamps and lanterns efficiency.

However, the lamp has poor illumination uniformity.

Disclosure of Invention

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

A light fixture, comprising:

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

the light source part 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 close to the light source part is provided with a light-permeable diffuse reflection area.

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

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

In one embodiment, the light-permeable diffuse reflection areas are arranged in a central symmetry mode by taking the center of the transparent medium as a symmetry center.

In one embodiment, the light-permeable diffuse reflection area is an annular light-permeable diffuse reflection area.

In one embodiment, the edge of the side of the housing where the light source device is disposed is provided with a reflecting member having 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 reflection area.

In one embodiment, the end of the light-permeable diffuse reflection area close to the center of the transparent medium is coincident with the circle center of the reflection member.

In one embodiment, the light source device 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 from the light source device.

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

Above-mentioned lamps and lanterns through the light-permeable diffuse reflection district that transparent medium set up for the produced wide-angle light of light source spare shines to reflector layer department and can reflect to light-permeable diffuse reflection district, and partial light carries out the diffuse reflection by light-permeable diffuse reflection district, changes its reflection angle after, and the reflection effect of rethread reflector layer is incided to the middle part transparent area of transparent medium with the small-angle, and is emergent to the outside. Therefore, the light rays with large angles are converted into the light rays with small angles, and the light rays are uniformly emitted. And part of the light rays passing through the light-permeable diffuse reflection area are totally reflected in the light-permeable diffuse reflection area until the emergent angle is converted into a smaller angle, and the light rays can be emitted to the outside of the transparent medium.

The lamp can emit light rays with a larger angle, which are emitted by the light source part, to the reflecting layer, and the light rays are emitted out of the transparent medium at a smaller angle basically through diffuse reflection of the light-permeable diffuse reflection area and total reflection in the transparent medium, so that the light rays emitted by the lamp are concentrated and uniform.

Drawings

Fig. 1 is a schematic view of a first type of ray paths of a lamp according to an embodiment of the present invention;

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

fig. 3 is a schematic view of a third type of ray path of a lamp according to an embodiment of the invention;

fig. 4 is a schematic diagram of a fourth type of ray path of a lamp according to an embodiment of the invention;

fig. 5 is a schematic diagram of a fifth type of ray 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 still another embodiment of the present invention.

Reference numerals:

100. a housing; 101. an opening; 110. a structural cavity; 120. a light-reflecting layer; 130. a reflector; 200. a light source element; 210. a light emitting 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. a light permeable diffuse reflection area.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

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

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

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or 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 as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1, fig. 1 shows a schematic structural diagram of a lamp in an embodiment of the invention. An embodiment of the invention provides a lamp, which includes a housing 100, a light source 200, and a transparent medium 300.

Wherein the housing 100 is provided with a structural cavity 110 having an opening 101, as in fig. 1-7. 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 device 200. The light source device 200 may generate light. Wherein most of the light rays are emitted to the outside of the lamp through the opening 101 of the structural cavity 110 at a small angle (the included angle between the light rays and the direction perpendicular to the plane of the opening 101 is less 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 (the included angle between the light and the direction perpendicular to the plane of the opening 101 is greater than or equal to 80 °), and then the light is reflected toward the opening 101 of the structural cavity 110 by the light reflection effect of the light reflection layer 120.

The transparent medium 300 is disposed at the opening 101 of the case 100. The light may pass through the transparent medium 300 to be irradiated to the outside of the lamp. The edge of the side of the transparent medium 300 facing the light source device 200 is provided with a light-transmittable diffusive reflective area 400. Here, it should be noted that: the light-permeable diffuse reflection area 400 means that a small portion of light can pass through the area while the light can be diffusely reflected at the area. That is, although the light-permeable diffuse reflection area 400 may diffuse the light, the light is not totally diffuse-reflected, i.e., part of the light may pass through the light-permeable diffuse reflection area 400 into the transparent medium 300. Due to the arrangement, the light can be diffusely reflected by the light-permeable diffuse reflection area 400, a certain light transmittance is kept, and the lamp efficiency of the lamp is improved.

As shown in fig. 1, small angle light rays may be directly incident to portions of the non-light transmissible, diffusely reflective regions 400 of the transparent medium 300 and refracted out of the transparent medium 300 at a smaller angle.

As shown in fig. 2, a part of the large-angle light can be directly incident to the light-permeable diffuse reflection area 400, and the rest of the large-angle light is incident to the reflective layer 120 and reflected to the light-permeable diffuse reflection area 400.

Of the light incident to the light-transmittable, diffuse reflection area 400:

as shown in fig. 3, most of the light rays are diffusely reflected at the position and are diffusely reflected toward the side of the transparent medium 300 close to the light source element 200 to change the angle at which the light rays exit to the reflective layer 120, so that the light rays can be irradiated from the transparent medium 300 to the outside of the lamp at a smaller exit angle. For ease of understanding, the description refers to the incident and exit angles. The incident angle is an included angle between the incident light and the normal of the incident surface, and the emergent angle is an included angle between the emergent light and the normal of the incident surface.

Wherein, part of the light incident on the reflective layer 120 at a smaller incident angle (for example, the light a in the figure) can be reflected by the reflective layer 120 and exit from the middle of the transparent medium 300 at a smaller angle. Part of the light incident on the light-reflecting layer 120 at a smaller incident angle will be reflected by the light-reflecting layer 120 to the light-permeable diffuse reflection area 400, and diffuse reflection will be performed continuously, so as to repeat the above process.

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

Let the refractive index of the transparent medium 300 be n₁The 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 both air, and the refractive index of the air is n₂At this time, θ_c＝arcsin(n₂/n₁) Therefore, the incident angle θ of the light in the transparent medium 300>θ_cIn this case, the light is continuously reflected without being refracted in the transparent medium 300. 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_cAt this time, the light is refracted out of the transparent medium 300 and emitted to the outside of the lamp (as shown by the light b), or the light is refracted to the outside of the lamp after being diffusely reflected at the light-transmittable and diffusely reflective region 400 (as shown by the light c). As shown in FIG. 5, if the exit angle of the light is larger than the critical angle θ of the transparent medium 300_cThe light may be totally reflected inside the transparent medium 300.

As shown in fig. 5, when the light is totally reflected in the transparent medium 300, the angle of the emergent angle of the light can be changed until the light is reflected to another light-permeable diffuse reflection area 400 (as shown by d) or reflected back to the original light-permeable diffuse reflection area 400 (as shown by e) for the next diffuse reflection or refraction. When the light is changed to be emitted at a small angle, the light may be emitted to the transparent medium 300. Wherein a part of the light can directly exit from the transparent medium 300 at a side away from the light source 200 (as shown by f and g). Another part of the light may exit from the side of the transparent medium 300 close to the light source element 200 to the reflective layer 120 (as shown by h ray). The light emitted from the light reflecting layer 120 may be directly emitted to the side of the transparent medium 300 away from the light source 200 (i rays in the figure) at a small angle or returned to the light-permeable diffuse reflection area 400 for a new round of diffuse reflection.

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

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 light reflecting layer 120 may be a spray or a plate-on arrangement. In some embodiments, the light reflecting layer 120 may be an ink layer. In the illustrated embodiment, the light-reflecting layer 120 is an ink layer of white pigment, which may be selected to be solar white. Due to the arrangement, the shell 100 has a good heat dissipation effect and a certain light reflection effect, so that light emitted by the light source element 200 and irradiated to the inner wall of the structural cavity 110 can be reflected to a certain degree, the light is convenient to emit, and the lamp efficiency 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 device 200 is disposed may be provided with the reflective device 130. The reflecting member 130 is arranged to reduce light loss while the light is reflected more effectively. In some embodiments, the reflective member 130 may be reflective paper having a 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 reflective member 130 away from the housing 100 may be an arc reflective surface. Due to the arrangement, when the light emitted by the light source 200 is reflected by the reflecting member 130, more light can be reflected to the light-permeable diffuse reflection area 400, so that the path of the light can be changed, and the light with a larger angle can be converted into light with a smaller angle and emitted to the outside of the lamp.

As shown in fig. 1-7, in some embodiments, the cross-sectional shape of the reflective member 130 may be a circular arc. That is, a side surface of the reflecting member 130 away from the casing 100 is a circular arc-shaped reflecting surface. In the illustrated embodiment, the cross-sectional shape of the reflecting member 130 may be a quarter-circular arc. The center of the 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 device 200. Such an arrangement allows light emitted from the light source device 200 and incident on the surface of the reflective member 130 with a relatively large angle to be reflected to the light-transmittable and diffusive reflective area 400 as much as possible. In other embodiments, the cross-sectional shape of the reflective member 130 may also be wavy, arcuate, or the like.

In some embodiments, a side surface of the reflector 130 away from the housing 100 may also be planar. Can be adjusted according to actual conditions. The cross-sectional shape of the reflecting member 130 may be a linear type, an L-type, a step-type, or the like.

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

The housing 100 can increase the reflection effect of light in the structural cavity 110 through the reflective layer 120 and the reflector 130, and reduce loss, thereby increasing the efficiency of the lamp.

As shown in fig. 1-7, in some embodiments, the light source device 200 may be connected to the PCB 230 so that the light source device 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 device 200, and may be adjusted according to actual conditions.

The number of the light emitting sources 210 in the light source device 200 may be one or more. If the number of the light sources 210 is multiple, the light sources 210 may be disposed at intervals, so that the emitted light is uniform.

As shown in fig. 1-7, in some embodiments, a lens 220 is disposed on the exterior of the light source 210. The lens 220 may be used to homogenize the light emitted by the light source 210. In some embodiments, the lens 220 has a thickness that gradually increases along the direction from the middle to the edge of the light source 210. Due to the arrangement, more light rays emitted from the middle of the light-emitting source 210 can be dispersed under the action of the lens 220, so that the light-emitting of the light-emitting source 210 is relatively uniform, and the occurrence of glare is reduced.

As shown in fig. 6 and 7, in some embodiments, the lens 220 may include a plane section 221, a curved section 222, and a platform section 223 along the direction from the middle to the edge of the light source 210. The plane of the planar segment 221 away from the plane of the light-emitting source 210 may be parallel to the plane of the transparent medium 300. The surface of the curved section 222 away from the light source 210 is a curved surface, which may be an arc surface. The curved section 222 gradually increases in distance from the middle of the light source 210 in the direction from the flat section 221 to the platform section 223. The platform 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, thereby reducing the occurrence of glare.

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

For example, in the embodiment shown in fig. 7, the incident angle of the light ray emitted from the side of the curved section 222 close to the platform section 223 to the edge of the light-permeable diffuse reflection area 400 close to the middle of the transparent medium 300 is 71 °. Thus, in this embodiment, it is considered that the high angle rays are greater than 71 and the low angle rays are equal to or less than 71.

In other embodiments, for a lamp with two or more light sources 210 and corresponding lenses 220, the light with large angle and the light with small angle can be defined according to the above standard; alternatively, the light rays defining a large angle with a radiation angle of 80 ° or more and a small angle with a radiation angle of less than 80 ° may be defined. When the two defining criteria are different ranges, the latter can be used as a criterion.

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 can be adjusted according to actual conditions.

The light source 200 can generate light and can also homogenize the light through the lens 220, thereby reducing glare and improving the effect of the lamp in the using process.

In some embodiments, the transparent medium 300 may be made of glass, or may be made of other materials, such as PC (Polycarbonate). The transparent medium 300 is disposed at the opening 101 of the case 100. The transparent medium 300 and the housing 100 may be clamped, screwed or connected by other methods, which may be selected according to the actual situation.

In some other embodiments, as shown in fig. 6, at least one of the surfaces of the transparent medium 300 near and far from the light source device 200 may be provided with at least one light-transmissive 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. By the arrangement, the light-transmitting layer 310 can be increased or decreased, and the light-transmitting layer 310 made of different materials can be changed, so that the refraction angle of the light rays when the light rays are refracted out of the transparent medium 300 can be changed, and the irradiation range of the lamp can be adjusted.

A light-transmittable diffusive reflective area 400 is disposed on a side of the transparent medium 300 adjacent to the light source unit 200. Wherein the light-transmittable diffusive reflective area 400 can be disposed at the edge of the transparent medium 300. The arrangement can avoid influence on the emergent rays with small angles in the process of adjusting the angles of the emergent rays with large angles.

In some embodiments, the light transmittance T of the light permeable diffuse reflection area 400 has a value range of: t is more than or equal to 50 percent and less than 100 percent. For example, the light transmittance of the light-permeable diffuse reflection area 400 is 50%, 60%, 70%, 80%, 85%, 90%, or 95%. 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 simultaneously, part of the light can be emitted through the light-permeable diffuse reflection area 400, so that the lamp efficiency of the lamp is high.

In some embodiments, the surface of the light-permeable diffuse reflection area 400 near the light source element 200 is frosted. The frosted surface may be provided such that the light-transmittable diffusive reflective region 400 has a diffusive reflective effect. That is, when light is incident on the ground surface, the light can be diffusely reflected.

In some embodiments, the light-permeable diffuse reflection area 400 can be formed by attaching a diffuse reflection film or by locally frosting the surface of the transparent medium 300. The edge of the side of the transparent medium 300 near the light source device 200 may be formed into the light-transmittable diffuse reflection area 400 by any of the above-described means.

In some embodiments, the light-permeable diffuse reflection area 400 is near the surface of the light source element 200, and may be in the same plane with the surface of the transparent medium 300 near the light source element 200. In other embodiments, the light-permeable diffuse reflection area 400 is near the surface of the light source element 200 and may protrude from the surface of the transparent medium 300 near the light source element 200. In other embodiments, the light-permeable diffusion reflection area 400 is near the surface of the light source element 200, and may be recessed in the surface of the transparent medium 300 near the light source element 200. The actual selection can be made according to the process. In addition, in the embodiment where the transparent medium 300 is provided with the light-transmitting layer 310 on the side close to the light source device 200, the surface of the light-transmitting diffuse reflection region 400 close to the light source device 200 may be flush with the surface of the light-transmitting layer 310 close to the light source device 200.

The shape of the light-permeable diffuse reflection area 400 may be a regular shape or an irregular shape. In some embodiments, as shown in fig. 1-7, the light-permeable diffuse reflection area 400 is disposed in a central symmetry with the center of the transparent medium 300 as the center of symmetry. The above arrangement allows the light refracted into the transparent medium 300 by the light-transmittable diffuse reflection area 400 and totally reflected in the transparent medium 300 to be diffusely reflected to change the exit angle thereof when reaching the symmetrical light-transmittable diffuse reflection area 400, thereby facilitating such light to be emitted at an angle smaller than the critical angle θ_cAnd exits toward the surface of the transparent medium 300 remote from the light source device 200 and refracts the transparent medium 300 to illuminate the exterior of the lamp.

In some embodiments, as shown in fig. 1-7, the shape of the light-permeable diffuse reflection area 400 is annular, i.e., the light-permeable diffuse reflection area 400 is annular. Due to the arrangement, more light rays with large angles reflected to the edge of the transparent medium 300 by the reflection layer 120 or the reflection piece 130 can be subjected to diffuse reflection, so that the outgoing angle of the light rays from the transparent medium 300 is adjusted, the lamp efficiency of the lamp is high, and the outgoing light effect is good.

In some embodiments, the width (D in fig. 7) of the annular light-transmittable diffusive reflective region 400 can be slightly larger than the width of the reflective member 130. It should be noted that the width of the light-permeable diffuse reflection area 400 refers to the distance between the two side edges of the light-permeable diffuse reflection area 400 along the outer portion to the middle portion of the transparent medium 300, which is exposed in the inner range of the structural cavity 110 after the transparent medium 300 is installed on the housing 100. The width of the reflective member 130 refers to a distance between planes on which both ends of the reflective member 130 are located in a direction from the edge of the outer case 100 to the middle of the outer case 100 along the reflective member 130. For example, in some embodiments, the light-transmissible diffuse reflection region 400 has the same width as the reflection member 130. Such an arrangement may allow more high-angle light rays refracted by the reflecting member 130 to exit to the light-transmittable, diffusely reflecting region 400, thereby being converted.

In some embodiments, the distance (H in fig. 7) between the plane of the side surface of the light-permeable diffusion reflection area 400 close to the light source element 200 and the plane of the bottom of the structural cavity 110 of the housing 100 far from the opening 101 may be equal to the width of the light-permeable diffusion reflection area 400. With such an arrangement, more light rays with large angles incident on the surface of the transparent medium 300 near the light source 200 can be emitted to the light-permeable diffuse reflection area 400, so as to be subsequently subjected to diffuse reflection, refraction or total reflection to be converted into light rays with smaller angles.

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

Through the setting of above-mentioned light-permeable diffuse reflection district 400, can make great angle incident to reflection part 130 and incident to the light of light-permeable diffuse reflection district 400, can be through diffuse reflection, refraction or the total reflection after with the mode of low-angle by transparent medium 300 outgoing, turn into the light outgoing of small angle with the light of large angle, when improving lamps and lanterns efficiency, increase the light of small angle to improve the homogeneity of the light that lamps and lanterns sent. And the light emitted from the light source unit 200 at a small angle is not affected.

In some embodiments, the range of the exit angle after the large-angle light is converted into the small-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. In the process of changing the material of the transparent medium 300, at least one surface of the transparent medium 300 may be plated with a light-transmitting layer 310. The material of the transparent layer 310 is different from that of the transparent medium 300, so that the range of the emergent 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 exit angle of the light can be changed, but also the maximum light-emitting angle of the lamp can be controlled, so that the glare is effectively inhibited.

In one 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 wall of the structural cavity 110 is coated with an ink layer of solar white pigment. The edge of the side of the housing 100 where the light source device 200 is disposed is provided with a reflecting member 130, and the reflecting member 130 is a ring-shaped reflecting member 130 disposed along the circumference of the structural cavity 110. The reflecting member 130 is a reflective paper. A side surface of the reflective member 130 facing away from the housing 100 may be an arc-shaped reflective surface. The cross-sectional shape of the reflecting member 130 is a quarter circular arc. The center of the arc is located on the plane of the light-permeable diffuse reflection area 400. The light source device 200 is located on a side of the housing 100 away from the opening 101 of the structural cavity 110.

In addition, the transparent medium 300 may be glass. The transparent medium 300 is provided with a light-transmittable and diffusive reflective area 400 in a ring shape at a side thereof adjacent to the light source unit 200. The light-transmittable diffusive reflective region 400 is made by a frosting process. The end of the light-transmittable diffusive reflective area 400 near the center of the transparent medium 300 coincides with the center of the reflective member 130. That is, the light-transmittable diffusive reflective area 400 has a width corresponding to a radius formed by the arc-shaped reflective surface of the reflective member 130. The distance between the plane of the side surface of the light-transmittable and diffuse-reflective region 400 close to the light source and the plane of the bottom of the structural cavity 110 of the housing 100 away from the opening 101 is equal to the width of the light-transmittable and diffuse-reflective region 400, that is, equal to the radius formed by the arc-shaped reflective surface of the reflective member 130. For example, each may be 30 mm. In some other embodiments, the value may be adjusted according to actual conditions.

The light-transmittable diffusive reflective area 400 is an annular light-transmittable diffusive reflective area 400. 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 located at one side of the light-permeable diffuse reflection area 400 close to the transparent medium 300. That is, the width of the annular light-transmittable diffusive reflective area 400 may be equal to the width of the reflective member 130; the distance between the plane of the side surface of the light-transmittable diffuse reflection area 400 close to the light source element 200 and the plane of the bottom of the structural cavity 110 of the housing 100 away from the opening 101 is equal to the width of the light-transmittable diffuse reflection area 400.

The lamp has high lamp efficiency, and simultaneously converts large-angle light rays into small-angle light rays and uniformly emits the small-angle light rays, so that the uniformity of the light rays emitted by the lamp is good. In addition, the glare degree of the lamp is low.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A light fixture, comprising:

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

2. A lamp as recited in claim 1, wherein the light transmittance T of the light-permeable diffusive reflective area is in a range of: t is more than or equal to 50 percent and less than 100 percent.

3. A lamp as recited in claim 1, wherein a surface of the light-transmittable and diffuse-reflective region adjacent to the light source element is frosted.

4. The lamp of claim 1, wherein the light-permeable diffuse reflection areas are arranged in a central symmetry manner with the center of the transparent medium as a symmetry center.

5. A light fixture as recited in claim 1, wherein said light permeable, diffuse reflective area is an annular light permeable, diffuse reflective area.

6. A lamp as recited in claim 1, wherein an edge of a side of the housing on which the light source element is disposed is provided with a reflector having an arcuate reflective surface.

7. A lamp as recited in claim 6, wherein a center of the arcuate reflective surface of the reflector is located within the diffuse light permeable reflective region.

8. A lamp as recited in claim 7, wherein an end of the light permeable, diffuse reflecting area proximate the center of the transparent medium coincides with the center of the reflector.

9. The lamp of claim 1, wherein the light source comprises a light source and a lens, the lens is disposed outside the light source, and the lens is configured to homogenize light emitted from the light source.

10. A lamp as recited in any one of claims 1-9, wherein at least one of the surfaces of the transparent medium facing toward and away from the light source element is provided with a light transmissive layer.