WO2018228207A1 - 一种光学元件及应用该光学元件的照明装置 - Google Patents

一种光学元件及应用该光学元件的照明装置 Download PDF

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Publication number
WO2018228207A1
WO2018228207A1 PCT/CN2018/089294 CN2018089294W WO2018228207A1 WO 2018228207 A1 WO2018228207 A1 WO 2018228207A1 CN 2018089294 W CN2018089294 W CN 2018089294W WO 2018228207 A1 WO2018228207 A1 WO 2018228207A1
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WIPO (PCT)
Prior art keywords
light
optical element
emitting
light emitting
lens
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PCT/CN2018/089294
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English (en)
French (fr)
Inventor
卜晨曦
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苏州欧普照明有限公司
欧普照明股份有限公司
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Priority claimed from CN201720685404.8U external-priority patent/CN207162433U/zh
Priority claimed from CN201710442578.6A external-priority patent/CN107166334B/zh
Application filed by 苏州欧普照明有限公司, 欧普照明股份有限公司 filed Critical 苏州欧普照明有限公司
Publication of WO2018228207A1 publication Critical patent/WO2018228207A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F21S8/04—Lighting devices intended for fixed installation intended only for mounting on a ceiling or the like overhead structures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00—Refractors for light sources
    • F21V5/04—Refractors for light sources of lens shape

Definitions

  • the invention belongs to the technical field of illumination, and in particular relates to an optical component and an illumination device using the same.
  • the lens is widely used in lighting fixtures such as ceiling lamps and wall lamps.
  • Such ceiling lamps often have the disadvantages of thick appearance and easy dark areas.
  • most of the methods in the market use a light guide plate instead of a lens for light distribution.
  • the light guide plate has the disadvantages of high cost and low light efficiency, and the illumination lamp using the light guide plate has a single illumination form. Beautiful.
  • An object of the present invention is to solve the above problems and to provide an illumination device having both a main illumination and a backlight.
  • the present invention provides an optical element including a light incident surface, two upper reflecting surfaces, two lower reflecting surfaces, and two light emitting surfaces, the light incident surface being located at the optical element Forming a receiving cavity for accommodating the light-emitting unit, the two upper reflecting surfaces are located at the top of the optical element and intersect each other, and the two lower reflecting surfaces are respectively connected to opposite sides of the light-incident surface
  • the two light-emitting surfaces are located on opposite sides of the light-incident surface, and the upper reflective surface and the lower reflective surface cooperate to reflect light emitted by the light-emitting unit located in the receiving cavity to the light-emitting surface.
  • the light incident surface includes an upper light incident surface and a side light incident surface, wherein the upper light incident surface is a bottom surface of the receiving cavity, and the side light incident surface is a side surface of the receiving cavity.
  • the two upper reflecting surfaces of the element form a V-shaped structure.
  • V-shaped structure has an included angle of between 35° and 55°.
  • the lower reflecting surface is a curved surface and is a convex surface.
  • the two light emitting surfaces are parallel surfaces.
  • At least one of the two light-emitting surfaces is uniformly provided with a plurality of ribs along the extending direction of the optical element.
  • the optical element is a stretch type lens, and its shape is curved, circular, rectangular or polygonal.
  • At least one of the two light-emitting surfaces is provided with a filter film on the light-emitting surface.
  • each of the light emitting surfaces is connected to an upper reflecting surface and a lower reflecting surface.
  • the present invention provides a lighting device including a chassis, a light emitting component disposed in the chassis, and an optical component disposed on the light emitting component, the light emitting component including a light source panel and disposed at the light source A light emitting unit on the board, the light emitting unit being housed in the optical element.
  • the chassis includes a bottom wall and a side wall, and the first light emitting surface and the second light emitting surface are located above the side wall in a vertical direction.
  • the illuminating device further includes a mask disposed above the optical element, the two illuminating surfaces being a first illuminating surface and a second illuminating surface, and the light emitted by the first illuminating surface is from the mask Transmitted, the light emitted by the second illuminating surface is directly emitted from the side of the chassis.
  • the mask includes a light transmitting portion located directly above the top region of the optical element, and a light blocking portion located inside or outside the light shielding portion.
  • the optical element is an annular structure, an inner annular surface or an outer annular surface of the optical element, the bottom wall and the mask form an optical cavity, and light emitted by the first light-emitting surface enters the optical cavity After being reflected multiple times, it is transmitted by the mask.
  • optical component is a structural or spliced structure.
  • the lighting device of the present invention has
  • the inner optical element directs the upward light emitted by the light emitting unit to both sides to form a side light emitting form, and the outgoing light on one side constitutes the main light emitting body of the illumination device, and the outgoing light on the other side directly hits the wall or the ceiling. Play as a background light.
  • the illuminating device has the advantages of thin thickness, good illuminating effect and beautiful appearance.
  • FIG. 1 is a perspective view of a lighting device according to Embodiment 1 of the present invention.
  • Figure 2 is an exploded view of the lighting device of Embodiment 1 of the present invention.
  • Figure 3 is an exploded perspective view showing another angle of the lighting device of Embodiment 1 of the present invention.
  • Figure 4 is a cross-sectional view taken along line A-A of Figure 1;
  • Figure 5 is a partial enlarged view of a lens cross section in the circle of Figure 4;
  • Figure 6 is a perspective view of a lighting device according to Embodiment 2 of the present invention.
  • Figure 7 is an exploded view of a lighting device according to Embodiment 2 of the present invention.
  • Figure 8 is a cross-sectional view taken along line B-B of Figure 6
  • Figure 9 is a perspective view of a lighting device according to Embodiment 3 of the present invention.
  • Figure 10 is an exploded view of a lighting device according to Embodiment 3 of the present invention.
  • Figure 11 is a further exploded view of the lighting device of Embodiment 3 of the present invention.
  • the present embodiment provides an illumination device 100a including a chassis 1a, a light-emitting assembly 3a disposed in the chassis 1a, a lens 4a disposed on the light-emitting assembly 3a, and a lens 4a disposed above the lens 4a.
  • the mask 2a wherein the lens 4a has two light-emitting surfaces and emits light toward both sides of the lens 4a, and the light emitted from one side of the lens 4a is finally transmitted upward by the mask 2a as the main illuminator of the illumination device 100a, by the lens Light emitted from the other side of 4a is emitted from the outside of the illumination device 100a as background light.
  • the illuminating device 100a of the present invention can be attached to a ceiling (not shown) as a ceiling lamp, or can be mounted as a wall lamp on a wall (not shown).
  • the chassis 1a has a circular shape including a bottom wall 11a and a side wall 12a.
  • the chassis 1a may be made of a heat conductive metal material such as aluminum, or may be integrally formed of a heat conductive plastic or a plastic aluminum material. Therefore, the chassis 1a has high thermal conductivity, and when the light emitting unit 3a located in the chassis 1a generates heat, heat can pass. The chassis 1a is quickly dissipated, thereby preventing the temperature in the chassis 1a from being excessively high and affecting the use quality and service life of the light-emitting assembly 3a.
  • the mask 2a is a circular plate which may be a light homogenizing plate.
  • the mask 2a and the chassis 1a may be directly connected or indirectly connected through the lens 4a or other connecting members, and the connecting manner may be a snap connection, a screw connection or other connection manner.
  • the mask 2a includes a light transmitting portion 21a and a light blocking portion 22a.
  • the light blocking portion 22a has a ring shape and is located directly above the top region of the lens 4a.
  • the light transmitting portion 21a has a circular shape inside the light shielding portion 22a.
  • the light-emitting assembly 3a includes an annular light source panel 31a and a plurality of light-emitting units 32a on the light source panel 31a.
  • the light source panel 31a is fixed to the chassis 1a, and the light emitting units 32a are evenly arranged along the light source panel 31a.
  • the light-emitting unit 32a is an LED light source
  • the light source plate 31a is integrally formed.
  • the light source plate 31a may be formed by splicing a plurality of curved light source plate units.
  • the lens 4a has an annular shape and is fixed in the chassis 1a.
  • the outer diameter of the lens 4a is similar to the outer diameter of the chassis 1a, and its height is higher than that of the side wall 12a.
  • the inner annular surface of the lens 4a, the bottom wall 11a, and the mask 2a constitute an optical cavity 10a.
  • the lens 4a is an optical element, which may be made of PMMA or PC, which is a unitary structure. In other alternative embodiments, it may also be composed of a plurality of curved lens units.
  • the lens 4a has an axisymmetric structure, and has an inner surface 41a and an outer surface 42a, and a receiving cavity 410a for receiving the light emitting unit 32a is surrounded by the inner surface 41a.
  • the inner surface 41a is a light incident surface and is located at the bottom of the lens 4a, and includes an upper light incident surface 411a and a side light incident surface 412a.
  • the upper light incident surface 411a is a bottom surface of the receiving cavity 410a
  • the side light incident surface 412a is a receiving cavity 410a. side.
  • the outer surface 42a includes a first upper reflecting surface 421a and a second upper reflecting surface 422a at the top and intersecting each other, a third lower reflecting surface 423a and a fourth opposite to the first upper reflecting surface 421a and the second upper reflecting surface 422a, respectively a lower reflecting surface 424a, and a first light emitting surface 425a and a second light emitting surface 426a facing the two sides, wherein the first upper reflecting surface 421a and the second upper reflecting surface 422a form a V-shaped structure, and the angle of the V-shaped structure is 35 Between -55°, the third lower reflecting surface 423a and the fourth lower reflecting surface 424a are respectively connected to opposite sides of the light surface, and the first light emitting surface 425a and the second light emitting surface 426a are located on opposite sides of the light incident surface.
  • the light exit surface defining the inner surface of the lens 4a is a first light exit surface 425a
  • the light exit surface of the outer ring surface of the lens 4a is a second light exit surface 426a.
  • the first light exit surface 425a connects the first upper reflective surface 421a and the third lower reflective surface.
  • the surface 423a and the second light-emitting surface 426a connect the second upper reflecting surface 422a and the fourth lower reflecting surface 424a.
  • the upper incident surface 411a is curved and protrudes toward the receiving cavity 410a
  • the side incident surface 412a is planar
  • the first upper reflecting surface 421a and the second upper reflecting surface 422a are planar
  • the surface 423a and the fourth lower reflecting surface 424a are curved surfaces and are convex
  • the first light-emitting surface 425a and the second light-emitting surface 426a are both planar.
  • the arrangement of the plane or the curved surface of the light incident surface, the reflective surface, and the light exit surface may be other combinations.
  • a plurality of ribs are uniformly disposed on the first light-emitting surface 425a along the extending direction of the lens 4a to make the outgoing light more uniform.
  • all the light emitted by the light-emitting unit 32a enters the lens 4a from the inner surface 41a, and the light on the right side of the central axis X is reflected and then emitted from the first light-emitting surface 425a, and the light on the left side of the central axis X is reflected. It is then emitted by the second light exit surface 426a. Specifically, a part of the right ray enters the lens 4a from the upper illuminating surface 411a, is reflected by the first upper reflecting surface 421a, and is directly emitted by the first illuminating surface 425a, and the other part of the ray enters the lens 4a from the side illuminating surface 412a.
  • the third lower reflecting surface 423a After that, it is collimated by the third lower reflecting surface 423a, and is reflected by the first upper reflecting surface 421a, and then emitted by the first light emitting surface 425a; a part of the left side light enters the lens 4a from the upper incident surface 411a, and then passes through the second upper surface.
  • the reflection surface 422a After the reflection surface 422a is reflected, it is directly emitted by the second light-emitting surface 426a, and the other portion of the light enters the lens 4a from the side light-incident surface 412a, is collimated by the fourth lower reflection surface 424a, and is reflected by the second upper reflection surface 422a. , is emitted by the second light-emitting surface 426a.
  • the first light-emitting surface 425a and the second light-emitting surface 426a are located above the side wall 12a in the vertical direction, and the light emitted by the first light-emitting surface 425a enters the optical cavity and is reflected multiple times. Thereafter, it is transmitted upward by the mask 2a as a main illuminant of the illumination device 100a.
  • the light emitted from the second light-emitting surface 426a is emitted from the outside of the illumination device 100a, and is irradiated as a background light on a wall or a ceiling.
  • a filter film may also be added on the second light-emitting surface 426a, so that the background light exhibits a color light effect.
  • a hollow tubular structure may be provided which is sleeved on the outside of the lens 4a and the light-emitting assembly 3a for fixing, and at the same time, the tubular structure is fixed to the chassis 1a.
  • the light-emitting assembly 3a and the lens 4a may also be in other fixed manners.
  • the upper reflecting surface and the lower reflecting surface mentioned in this embodiment are defined opposite to the two reflecting surfaces, and the positioning position of the illumination device 100a cannot be limited, that is, when the lighting device 100a is a wall-mounted luminaire, the upper reflection
  • the surface and the lower reflecting surface are left and right.
  • the present embodiment provides a lighting device 100b including a chassis 1b, a light-emitting assembly 3b disposed in the chassis 1b, a lens 4b disposed on the light-emitting assembly 3b, and a lens 4b disposed above the lens 4b.
  • the mask 2b wherein the chassis 1b includes a bottom wall 11b and a side wall 12b, the lens 4b has two light-emitting surfaces respectively emitting light toward the two sides of the lens 4b, and the light emitted from one side of the lens 4b is finally transmitted upward by the mask 2b as
  • the main illuminator of the illumination device 100b the light emitted from the other side of the lens 4b is emitted from the outside of the illumination device 100b as background light.
  • the illuminating device 100b of the present invention can be attached to a ceiling (not shown) as a ceiling lamp, or can be mounted as a wall lamp on a wall (not shown).
  • the illuminating device 100b has substantially the same structure as the illuminating device 100a, and the lens 4b and the lens 4a are also substantially identical in structure, and the difference between the chassis 1b and the mask 2b is annular, and the inner diameter of the lens 4b is close to the inner diameter of the chassis 1b.
  • the mask 2b includes a light transmitting portion 21b and a light blocking portion 22b.
  • the light blocking portion 22b has a ring shape and is located directly above the top region of the lens 4b.
  • the light transmitting portion 21b is a circular ring located outside the light shielding portion 22b.
  • the light-emitting surface defined on the outer ring surface of the lens 4b (that is, the light-emitting surface through which the final light is transmitted by the mask 2b) is defined as a first light-emitting surface 425b, and the light-emitting surface of the inner surface of the lens 4b (ie, the light-emitting surface directly emitted by the light) is The second light exit surface 426b.
  • the outer ring surface of the lens 4b, the bottom wall 11b, and the mask 2b constitute an optical cavity 10b.
  • the first light-emitting surface 425b and the second light-emitting surface 426b are located above the sidewall 12b in the vertical direction, and the light emitted by the first light-emitting surface 425b enters the optical cavity 10b, and after multiple reflections,
  • the mask 2b is transmitted upward as a main illuminator of the illumination device 100b.
  • the light emitted from the second light-emitting surface 426b is emitted from the inside of the illumination device 100b, and is irradiated as a background light on a wall or a ceiling.
  • a filter film may also be added on the second light-emitting surface 426b, so that the background light exhibits a color light effect.
  • the present embodiment provides a lighting device 100c including a chassis 1c, a light-emitting assembly 3c disposed in the chassis 1c, a lens 4c disposed on the light-emitting assembly 3c, and a lens 4c disposed above the lens 4c.
  • the mask 2c wherein the lens 4c has two light-emitting surfaces respectively emitting light toward the two sides of the lens 4c, and the light emitted from one side of the lens 4c is finally transmitted upward by the mask 2c as the main illuminant of the illumination device 100c, by the lens 4c
  • the light emitted from the other side is emitted from the outside of the illumination device 100c as a backlight.
  • the illuminating device 100c of the present invention can be mounted as a ceiling lamp on a ceiling (not shown) or as a wall lamp and attached to a wall (not shown).
  • the illuminating device 100c has substantially the same structure as the illuminating device 100a, and the difference is that the chassis 1c and the mask 2c are both square, and the chassis 1c includes a square bottom wall 11c and two annular side walls 12c.
  • the light-emitting assembly 3c and the lens 4c are both square-shaped, and the lens 4c is located between the two annular side walls 12c.
  • the light-emitting assembly 3c includes four strip-shaped light source panels 31c and a light-emitting unit 32c disposed on the light source panel 31c.
  • the lens 4c is formed by splicing four strip-shaped lens units 40c, and one lens unit 40c is disposed correspondingly above one light source panel 31c.
  • the mask 2c includes a light transmitting portion 21c and a light blocking portion 22c.
  • the light blocking portion 22c has a ring shape and is located directly above the top region of the lens 4c.
  • the light transmitting portion 21c is a square located inside the light shielding portion 22c.
  • the inner annular surface of the lens 4c, the bottom wall 11c, and the mask 2c constitute an optical cavity 10c.
  • the first light-emitting surface 425c and the second light-emitting surface 426c are located above the sidewall 12c in the vertical direction, and the light emitted by the first light-emitting surface 425c enters the optical cavity 10c, and is reflected upward by the mask 2c after being reflected multiple times.
  • the light emitted from the second light-emitting surface 426c is emitted from the outside of the illumination device 100c, and is irradiated as a background light on a wall or a ceiling.
  • a filter film may also be added on the second light-emitting surface 425c, so that the background light exhibits a color light effect.
  • the lens 4c is spliced, which reduces the cost of the mold and the manufacturing difficulty, and at the same time increases the flexibility.
  • the illumination device 100c can also be made polygonal.
  • the lens in the illumination directs the upward light emitted by the light-emitting unit to both sides to form a form of lateral illumination, and the emitted light on one side is reflected by the optical cavity and then emitted by the mask.
  • the main illuminator constituting the illuminating device, and the outgoing light on the other side directly hits the wall or the ceiling to function as a background light.
  • the illuminating device has the advantages of thin thickness, good illuminating effect and beautiful appearance.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

一种光学元件(4a)及应用该光学元件(4a)的照明装置(100a)，该光学元件(4a)包括入光面(41a)、两个上反射面(421a，422a)、两个下反射面(423a，424a)以及两个出光面（425a，426a），入光面（41a）位于光学元件（4a）的底部并围设形成用于收容发光单元的收容腔（410a），两个上反射面（421a，422a）位于光学元件（4a）的顶部并彼此相交，两个下反射面（423a，424a）分别连接入光面（41a）的相对两侧，两个出光面（425a，426a）位于入光面（41a）的相对两侧，上反射面（421a，422a）和下反射面（423a，424a）配合将位于收容腔（410a）内的发光单元（32a）所发出的光线反射至出光面（425a，426a）。照明装置（100a）内的光学元件（4a）将发光单元（32a）发出的向上的光线导向两侧，形成侧向发光的形式，一侧的出射光构成照明装置（100a）的主发光体，另一侧的出射光直接打在墙壁或者天花板上，起到背景光的作用。照明装置厚度薄、发光效果好、造型美观。

Description

一种光学元件及应用该光学元件的照明装置 技术领域
本发明属于照明技术领域，尤其涉及一种光学元件及应用该光学元件的照明装置。
背景技术
透镜作为一种配光元件，被广泛应用于吸顶灯、壁灯等照明灯具。现在市场上的吸顶灯和壁灯大多数采取直下式发光的形式，这种吸顶灯往往存在外观较厚，容易有暗区等缺点。而要让灯具变薄，市场上多数的做法是采用以导光板代替透镜进行配光的方式，但是导光板存在成本高，光效低的缺点，并且采用导光板的照明灯具发光形式单一、不够美观。
另外，为了让照明效果更有层次感，一些顾客要求吸顶灯和壁灯具有一定的背景光，用于照射在墙壁或者天花板上，然而直下式发光的灯具或者采用导光板的灯具都难以满足这方面的需求。
发明内容
本发明的目的是为了解决上述问题，提供一种照明装置，同时具有主发光和背景光两种发光效果。
为实现上述目的，本发明提供一种光学元件，所述光学元件包括入光面、两个上反射面、两个下反射面以及两个出光面，所述入光面位于所述光学元件的底部并围设形成用于收容发光单元的收容腔，所述两个上反射面位于所述光学元件的顶部并彼此相交，所述两个下反射面分别连接所述入光面的相对两侧，所述两个出光面位于所述入光面的相对两侧，所述上反射面和下反射面配合将位于所述收容腔内的发光单元所发出的光线反射至所述出光面。
进一步的，所述入光面包括上入光面和侧入光面，所述上入光面为所述收 容腔的底面，所述侧入光面为所述收容腔的侧面。
进一步的，所述光学
元件的两个上反射面构成V形结构。
进一步的，所述V形结构的夹角在35°-55°之间。
进一步的，所述下反射面为曲面且为凸面。
进一步的，所述两个出光面为平行面。
进一步的，所述两个出光面中至少一个出光面上沿所述光学元件的延伸方向均匀设置若干个棱条。
进一步的，所述光学元件为拉伸型透镜，其形状为弧形、圆形、长方形或多边形。
进一步的，所述两个出光面中至少有一个出光面上设置有滤光膜。
进一步的，每个所述出光面均连接一上反射面和下反射面。
为实现上述目的，本发明提供一种照明装置，包括底盘、设置在所述底盘内的发光组件和设置在所述发光组件上的光学元件，所述发光组件包括光源板和设置在所述光源板上的发光单元，所述发光单元收容在上述光学元件内。
进一步的，所述底盘包括底壁和侧壁，所述第一出光面和第二出光面在竖直方向均位于所述侧壁的上方。
进一步的，所述照明装置还包括设置在所述光学元件上方的面罩，所述两个出光面为第一出光面和第二出光面，由所述第一出光面出射的光线从所述面罩透射出去，由所述第二出光面出射的光线从所述底盘的侧面直接出射。
进一步的，所述面罩包括透光部和遮光部，所述遮光部位于所述光学元件的顶部区域的正上方，所述透光部位于遮光部的内侧或外侧。
进一步的，所述光学元件为环状结构，所述光学元件的内环面或外环面、所述底壁和所述面罩构成光学腔，由第一出光面出射的光线进入所述光学腔，经多次反射后由所述面罩透射出去。
进一步的，所述光学元件为一体是结构或者拼接式结构。
相较于现有技术，本发明的照明装置，其
内的光学元件将发光单元发出的向上的光线导向两侧，形成侧向发光的形式，一侧的出射光构成照明装置的主发光体，另一侧的出射光直接打在墙壁或者天花板上，起到背景光的作用。该照明装置厚度薄、发光效果好、并且造型美观。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本发明的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1为本发明实施例1的照明装置的立体图；
图2为本发明实施例1的照明装置的分解图；
图3为本发明实施例1的照明装置的另一角度的分解图；
图4为沿图1内A-A线的剖视图；
图5为图4圈内的透镜横截面的局部放大图；
图6为本发明实施例2的照明装置的立体图；
图7为本发明实施例2的照明装置的分解图；
图8为沿图6内B-B线的剖视图
图9为本发明实施例3的照明装置的立体图；
图10为本发明实施例3的照明装置的分解图；
图11为本发明实施例3的照明装置的进一步分解图。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合本发明具体实施例及相应的附图对本发明技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施 例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例1
如图1至图5所示，本实施例提供了一种照明装置100a，包括底盘1a、设置在底盘1a内的发光组件3a和设置在发光组件3a上的透镜4a、及设置在透镜4a上方的面罩2a，其中，透镜4a具有两个出光面且朝向透镜4a的两侧分别出光，由透镜4a的一侧出射的光线最后由面罩2a向上透射，作为照明装置100a的主发光体，由透镜4a的另一侧出射的光线从照明装置100a的外侧发射出去，作为背景光。本发明的照明装置100a可作为吸顶灯，安装于天花板(未图示)上，也可以作为壁灯，安装在墙壁(未图示)上。
以下针对本发明优选实施例提供的照明装置100a内的各个元件及元件之间的连接关系作具体说明。
如图1至图4所示，底盘1a呈圆形状，其包括底壁11a和侧壁12a。底盘1a可以由铝等导热金属材料制成，也可以由导热塑胶或塑包铝材料一体成型，因此，底盘1a具有高导热性能，当位于底盘1a内的发光组件3a产生热量时，热量可以通过底盘1a迅速散去，从而避免底盘1a内的温度过高而影响发光组件3a的使用质量和使用寿命。
面罩2a为圆形板，其可为匀光板。面罩2a与底盘1a之间可直接连接也可以通过透镜4a或其它连接件间接连接，连接方式可采用卡扣连接、螺钉连接或其它连接方式。面罩2a包括透光部21a和遮光部22a，遮光部22a呈环形，位于透镜4a的顶部区域的正上方，透光部21a为位于遮光部22a内侧的圆形。
如图2至图4所示，发光组件3a包括环形的光源板31a及位于光源板31a上的若干个发光单元32a。光源板31a固定在底盘1a上，发光单元32a沿着光源板31a均匀排布。在本实施例中，发光单元32a为LED光源，光源板31a一体成型，在其它可替换的实施例中，光源板31a可由若干个弧形的光源板单 元首尾拼接而成。
如图1至图4所示，透镜4a呈圆环状，其固定在底盘1a内。透镜4a的外径与底盘1a的外径相近，且其高度高于侧壁12a。透镜4a的内环面、底壁11a和面罩2a构成光学腔10a。透镜4a为一种光学元件，其材料可以是PMMA或者PC，其为一体式结构，在其它可替换的实施例中，其还可以由多段弧形的透镜单元构成。具体的，透镜4a为轴对称结构，其具有内表面41a、外表面42a及由内表面41a围设形成用于收容发光单元32a的收容腔410a。内表面41a为入光面且位于透镜4a的底部，其包括上入光面411a和侧入光面412a，上入光面411a为收容腔410a的底面，侧入光面412a为收容腔410a的侧面。外表面42a包括位于顶部并彼此相交的第一上反射面421a和第二上反射面422a、与第一上反射面421a和第二上反射面422a分别相对的第三下反射面423a和第四下反射面424a、及朝向两侧的第一出光面425a和第二出光面426a，其中，第一上反射面421a和第二上反射面422a构成V形结构，V形结构的夹角在35°-55°之间，第三下反射面423a和第四下反射面424a分别连接入光面的相对两侧，第一出光面425a和第二出光面426a位于入光面的相对两侧。定义位于透镜4a内环面的出光面为第一出光面425a，位于透镜4a外环面的出光面为第二出光面426a，第一出光面425a连接第一上反射面421a和第三下反射面423a，第二出光面426a连接第二上反射面422a和第四下反射面424a。在本实施例中，上入光面411a为曲面且向收容腔410a方向凸出，侧入光面412a为平面，第一上反射面421a和第二上反射面422a为平面，第三下反射面423a和第四下反射面424a为曲面且为凸面、第一出光面425a和第二出光面426a均为平面。在其它可替换的实施方式中，入光面、反射面和出光面的平面或曲面的设置，也可以采用其它的组合方式。在本实施例中，第一出光面425a上沿透镜4a的延伸方向均匀设置有若干个棱条，以使出射光线更均匀。
如图5所示，发光单元32a发出的光线全部由内表面41a进入透镜4a， 位于中轴线X右侧的光线经反射后由第一出光面425a出射，位于中轴线X左侧的光线经反射后由第二出光面426a出射。具体的，右侧光线一部分由上入光面411a进入透镜4a后，经过第一上反射面421a的反射后，直接由第一出光面425a出射，另一部分光线由侧入光面412a进入透镜4a后，经第三下反射面423a准直，并由第一上反射面421a反射后，由第一出光面425a出射；左侧光线一部分由上入光面411a进入透镜4a后，经过第二上反射面422a的反射后，直接由第二出光面426a出射，另一部分光线由侧入光面412a进入透镜4a后，经第四下反射面424a准直，再由第二上反射面422a反射后，由第二出光面426a出射。
结合图4和图5所示，第一出光面425a和第二出光面426a在竖直方向上均位于侧壁12a的上方，由第一出光面425a出射的光线进入光学腔，经多次反射后由面罩2a向上透射出去，作为照明装置100a的主发光体。由第二出光面426a出射的光线从照明装置100a的外侧发射出去，作为背景光照射在墙壁或者天花板上。在第二出光面426a上还可以加一层滤光膜，使得背景光呈现出彩光的效果。
对于透镜4a和发光组件3a的固定，可以设置一个空心的管状结构，套设在透镜4a和发光组件3a的外部，进行固定，同时，该管状结构固定在底盘1a上。在其它可替换的实施例中，发光组件3a和透镜4a也可以采用其它的固定方式。
本实施例中所提到的上反射面、下反射面是对两种反射面相对设置的限定，不能限定照明装置100a的摆放位置，即当照明装置100a为挂壁式灯具时，上反射面、下反射面即为左右相对。
实施例2
如图6至图8所示，本实施例提供了一种照明装置100b，包括底盘1b、设置在底盘1b内的发光组件3b和设置在发光组件3b上的透镜4b、及设置在透镜4b上方的面罩2b，其中，底盘1b包括底壁11b和侧壁12b，透镜4b具 有两个出光面朝向透镜4b的两侧分别出光，由透镜4b的一侧出射的光线最后由面罩2b向上透射，作为照明装置100b的主发光体，由透镜4b的另一侧出射的光线从照明装置100b的外侧发射出去，作为背景光。本发明的照明装置100b可作为吸顶灯，安装于天花板(未图示)上，也可以作为壁灯，安装在墙壁(未图示)上。
照明装置100b与照明装置100a的结构大致相同，透镜4b与透镜4a的结构也大致相同，其区别点在于，底盘1b和面罩2b均呈圆环状，透镜4b的内径与底盘1b的内径相近。面罩2b包括透光部21b和遮光部22b，遮光部22b呈环形，位于透镜4b的顶部区域的正上方，透光部21b为位于遮光部22b外侧的圆环形。定义位于透镜4b外环面的出光面(即最终光线由面罩2b透射出去的出光面)为第一出光面425b，位于透镜4b内环面的出光面(即光线直接出射的面出光面)为第二出光面426b。透镜4b的外环面、底壁11b和面罩2b构成光学腔10b。
如图8所示，第一出光面425b和第二出光面426b在竖直方向上均位于侧壁12b的上方，由第一出光面425b出射的光线进入光学腔10b，经多次反射后由面罩2b向上透射出去，作为照明装置100b的主发光体。由第二出光面426b出射的光线从照明装置100b的内侧发射出去，作为背景光照射在墙壁或者天花板上。在第二出光面426b上还可以加一层滤光膜，使得背景光呈现出彩光的效果。
实施例3
如图9至图11所示，本实施例提供了一种照明装置100c，包括底盘1c、设置在底盘1c内的发光组件3c和设置在发光组件3c上的透镜4c、及设置在透镜4c上方的面罩2c，其中，透镜4c具有两个出光面朝向透镜4c的两侧分别出光，由透镜4c的一侧出射的光线最后由面罩2c向上透射，作为照明装置100c的主发光体，由透镜4c的另一侧出射的光线从照明装置100c的外侧发射出去，作为背景光。本发明的照明装置100c可作为吸顶灯，安装于天花板(未 图示)上，也可以作为壁灯，安装在墙壁(未图示)上。
照明装置100c与照明装置100a的结构大致相同，其区别点在于，底盘1c、及面罩2c均呈方形，底盘1c包括方形的底壁11c和两个环形的侧壁12c。发光组件3c及透镜4c均为方形环状，透镜4c位于两个环形的侧壁12c之间。发光组件3c包括四个条形的光源板31c及设置在光源板31c上的发光单元32c。透镜4c由四个条形的透镜单元40c拼接而成，一个透镜单元40c对应设置在一条光源板31c的上方。面罩2c包括透光部21c和遮光部22c，遮光部22c呈环形，位于透镜4c的顶部区域的正上方，透光部21c为位于遮光部22c内侧的正方形。透镜4c的内环面、底壁11c和面罩2c构成光学腔10c。
第一出光面425c和第二出光面426c在竖直方向上均位于侧壁12c的上方，由第一出光面425c出射的光线进入光学腔10c，经多次反射后由面罩2c向上透射出去，作为照明装置100c的主发光体。由第二出光面426c出射的光线从照明装置100c的外侧发射出去，作为背景光照射在墙壁或者天花板上。在第二出光面425c上还可以加一层滤光膜，使得背景光呈现出彩光的效果。
本实施例的照明装置100c中透镜4c采用拼接的方式，减少了模具成本和制作难度，同时提高了灵活性。在其它可替换的实施例中，照明装置100c还可以制成多边形。
综上所述，本发明的照明装置，其内的透镜将发光单元发出的向上的光线导向两侧，形成侧向发光的形式，一侧的出射光经过光学腔多次反射后由面罩出射，构成照明装置的主发光体，另一侧的出射光直接打在墙壁或者天花板上，起到背景光的作用。该照明装置厚度薄、发光效果好、并且造型美观。
以上所述的具体实例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的具体实施例而已，并不用于限制本发明，凡在本发明的精神和原则之内，所做的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (16)

  1. 一种光学元件，其中，所述光学元件包括入光面、两个上反射面、两个下反射面以及两个出光面，所述入光面位于所述光学元件的底部并围设形成用于收容发光单元的收容腔，所述两个上反射面位于所述光学元件的顶部并彼此相交，所述两个下反射面分别连接所述入光面的相对两侧，所述两个出光面位于所述入光面的相对两侧，所述上反射面和下反射面配合将位于所述收容腔内的发光单元所发出的光线反射至所述出光面。
  2. 根据权利要求1所述的光学元件，其中，所述入光面包括上入光面和侧入光面，所述上入光面为所述收容腔的底面，所述侧入光面为所述收容腔的侧面。
  3. 根据权利要求1所述的光学元件，其中，所述光学元件的两个上反射面构成V形结构。
  4. 根据权利要求3所述的光学元件，其中，所述V形结构的夹角在35°-55°之间。
  5. 根据权利要求1所述的光学元件，其中，所述下反射面为曲面且为凸面。
  6. 根据权利要求1所述的光学元件，其中，所述两个出光面为平行面。
  7. 根据权利要求1所述的光学元件，其中，所述两个出光面中至少一个出光面上沿所述光学元件的延伸方向均匀设置若干个棱条。
  8. 根据权利要求1所述的光学元件，其中，所述光学元件为拉伸型透镜，其形状为弧形、圆形、长方形或多边形。
  9. 根据权利要求1所述的光学元件，其中，所述两个出光面中至少有一个出光面上设置有滤光膜。
  10. 根据权利要求1所述的光学元件，其中，每个所述出光面均连接一上反射面和下反射面。
  11. 一种照明装置，其中，包括底盘、设置在所述底盘内的发光组件和设置在所述发光组件上的光学元件，所述发光组件包括光源板和设置在所述光源板上的发光单元，所述发光单元收容在上述权利要求1至10中任一项所述的光学元件内。
  12. 根据权利要求11所述的照明装置，其中，所述底盘包括底壁和侧壁，所述第一出光面和第二出光面在竖直方向均位于所述侧壁的上方。
  13. 根据权利要求11所述的照明装置，其中，所述照明装置还包括设置在所述光学元件上方的面罩，所述两个出光面为第一出光面和第二出光面，由所述第一出光面出射的光线从所述面罩透射出去，由所述第二出光面出射的光线从所述底盘的侧面直接出射。
  14. 根据权利要求13所述的照明装置，其中，所述面罩包括透光部和遮光部，所述遮光部位于所述光学元件的顶部的正上方，所述透光部位于遮光部的内侧或外侧。
  15. 根据权利要求13所述的照明装置，其中，所述光学元件为环状结构，所述光学元件的内环面或外环面、所述底壁和所述面罩构成光学腔，由第一出光面出射的光线进入所述光学腔，经多次反射后由所述面罩透射出去。
  16. 根据权利要求10所述的照明装置，其中，所述光学元件为一体是结构或者拼接式结构。
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