阅读说明：本技术 一种导光元件及灯具 (Light guide element and lamp ) 是由 孙鑫 李冲冲 郭金明 于 2021-06-25 设计创作，主要内容包括：本申请提供的导光元件和灯具,采用环形入光面,入射光源不集中在柱体中间位置,环形结构的入射面邻近位置可以设置反射面,使得大角度入射光经反射面反射后射向柱体上方,从而解决了原有光线集中在下方的问题。而第二光学面的偏光设计进一步解决底部光线集中的问题。LED灯珠发出的光经过此结构后被改变原有的入光角度进入导光柱,将有效改善导光柱的均匀性,并且通过调整入光角度也会提高光利用率。(The application provides a leaded light component and lamps and lanterns adopts the annular income plain noodles, and incident light source does not concentrate on cylinder intermediate position, and the adjacent position of incident surface of loop configuration can set up the plane of reflection for big-angle incident light is through directive cylinder top after the plane of reflection, thereby has solved the problem that original light concentrates on the below. And the polarized light design of the second optical surface further solves the problem of bottom light concentration. The light that LED lamp pearl sent is changed original income light angle and is got into the leaded light post after this structure, will effectively improve the homogeneity of leaded light post to go into the light angle through the adjustment and also can improve light utilization ratio.)

1. The utility model provides a light guide element, its characterized in that, light guide element is solid columnar structure, including relative first terminal surface, the second terminal surface that sets up and the side of connecting these two terminal surfaces, goes into the plain noodles and sets up on first terminal surface, the side is the play plain noodles, go into the plain noodles for by first terminal surface to the annular face that light guide element is inside sunken to be formed.

2. A light directing element according to claim 1, wherein: the first end face is further provided with a horn-shaped structure, the first end face faces the light guide element, the inside of the light guide element is sunken, the transverse section of the horn-shaped structure is gradually reduced, the horn-shaped structure and the annular face are coaxial, a first reflecting face is formed on the side face of the horn-shaped structure, and the light incident face surrounds the first reflecting face.

3. A light directing element according to claim 2, wherein: the first reflecting surface is a free-form surface protruding outward from the light guide element.

4. A light directing element according to claim 2, wherein: the side surface is close to the first end surface and is a second reflecting surface, and the second reflecting surface surrounds the light incident surface.

5. A light-directing element as recited in claim 4, wherein: the second reflecting surface is a free-form surface protruding outward from the light guide element.

6. A light directing element according to claim 2, wherein: go into the plain noodles including the first optical surface, second optical surface, the third optical surface that connect gradually, the second optical surface with first terminal surface sets up relatively, first optical surface is neighbouring first plane of reflection, one end is connected first terminal surface, the other end is connected the second optical surface, the third optical surface is neighbouring second plane of reflection, one end is connected second optical surface, the other end is connected first terminal surface.

7. A light-directing element as recited in claim 6, wherein: on a section passing through the axis of the light guide element, the section of the second optical surface is a curve, and the sections of the first optical surface and the third optical surface are straight lines.

8. A light directing element according to claim 7, wherein: the distance from the connecting point of the second optical surface and the first optical surface to the first end surface is smaller than the distance from the connecting point of the second optical surface and the third optical surface to the first end surface.

9. A light directing element according to claim 8, wherein: the second optical surface is a free-form surface protruding outwards from the light guide element to form a polarized light structure, and light is incident through the second optical surface and then deflects towards the center direction of the light guide element.

10. A light directing element according to any of claims 1-9, wherein: the light emitting surface comprises a diffuse reflection structure, and the diffuse reflection structure is a microstructure array or is formed by surface sand blasting.

11. A light directing element according to claim 8, wherein: the diffuse reflection structures are distributed unevenly, and the distribution density of the diffuse reflection structures is proportional to the distance from the positions of the diffuse reflection structures to the first end face, namely the distribution density of the diffuse reflection structures is larger as the diffuse reflection structures are farther away from the first end face.

12. A light directing element according to claim 11, wherein: the microstructure is a pyramid, hexagon, spherical arch, pyramid, linear groove or surface dotting structure.

13. A light fixture, characterized by: the luminaire comprises a light source and a light guiding element according to any one of claims 1 to 12, the light source being annularly arranged to be covered by the light incident surface of the light guiding element.

Technical Field

The present invention relates to a light guide element, and more particularly, to a light guide element for a lamp, and a related lamp.

Background

The invention discloses a lamp which enables a human to conquer night, changes the night into day and expands the range and the activity time of human activities. The development of the LED brings more design space for the lamp design, and the light guide element is popular with users due to its advantages of variable shape, uniform light and high light emitting efficiency, and is widely applied to the lamp design.

The common light guide column type lamp light emitting mode is mostly that the LED directly faces the middle position of the light guide column light incident surface, and because the LED is a lambertian light source with a light emitting angle of 120 degrees, the interface reflection received by the light emitted by the LED in the large-angle direction when the light is emitted into the light guide column light incident surface is high, so that part of the light can not enter the light guide column to lose part of efficiency. And because a large amount of light incident angles are large, the light cannot have enough effective propagation distance after entering the light guide column and is concentrated in the bottom area of the light guide column, so that the light guide column emits light unevenly from top to bottom.

Disclosure of Invention

The invention aims to solve the problems of low luminous efficiency, uneven light emission and the like of a light guide column lamp, and provides a light guide element with a novel light incident structure.

In order to achieve the above functions, the present invention adopts a technical solution of providing a light guide element, which is characterized in that the light guide element is a solid columnar structure and includes a first end surface, a second end surface and a side surface connecting the two end surfaces, the light incident surface is disposed on the first end surface, the side surface is a light emergent surface, and the light incident surface is an annular surface formed by recessing the first end surface toward the inside of the light guide element.

Preferably, the first end face is further provided with a horn-shaped structure, the transverse section of the horn-shaped structure is gradually reduced towards the inner part of the light guide element from the first end face, the horn-shaped structure and the annular face are coaxial, a first reflecting face is formed on the side face of the horn-shaped structure, and the light incident face surrounds the first reflecting face.

Preferably, the first reflecting surface is a free-form surface protruding outward from the light guide element.

Preferably, the side surface is a second reflecting surface near the first end surface, and the second reflecting surface surrounds the light incident surface.

Preferably, the second reflecting surface is a free-form surface protruding outward from the light guide element.

Preferably, go into the plain noodles including the first optical surface, second optical surface, the third optical surface that connect gradually, the second optical surface with first terminal surface sets up relatively, first optical surface is neighbouring first plane of reflection, and one end is connected first terminal surface, the other end is connected the second optical surface, the third optical surface is neighbouring the second plane of reflection, one end is connected the second optical surface, the other end is connected first terminal surface.

Preferably, in a cross section passing through the axis of the light guide element, the cross section of the second optical surface is a curved line, and the cross sections of the first optical surface and the third optical surface are straight lines.

Preferably, a distance from a connection point of the second optical surface and the first optical surface to the first end surface is smaller than a distance from a connection point of the second optical surface and the third optical surface to the first end surface.

Preferably, the second optical surface is a free-form surface protruding outward from the light guide element to form a polarization structure, and light is incident through the second optical surface and then is deflected toward the center of the light guide element.

Preferably, the light emitting surface comprises a diffuse reflection structure, and the diffuse reflection structure is a microstructure array or is formed by surface sand blasting.

Preferably, the diffuse reflection structures are distributed unevenly, and the distribution density of the diffuse reflection structures is proportional to the distance from the positions of the diffuse reflection structures to the first end face, that is, the farther away from the first end face, the greater the distribution density of the diffuse reflection structures.

Preferably, the microstructure is a pyramid, a hexagon, a spherical arch, a pyramid, a linear groove or a surface dotted structure.

The application also provides a lamp, its characterized in that: the lamp comprises the light source and the light guide element, and the light source is annularly arranged and covered by the light incident surface of the light guide element.

According to the light guide element provided by the invention, the incident light source is not concentrated at the middle position of the cylinder, and the reflecting surface can be arranged at the position adjacent to the incident surface of the annular structure, so that large-angle incident light is reflected by the reflecting surface and then emitted to the upper part of the cylinder, and the problem that the original light is concentrated at the lower part is solved. And the polarized light design of the second optical surface further solves the problem of bottom light concentration. The light that LED lamp pearl sent is changed original income light angle and is got into the leaded light post after this structure, will effectively improve the homogeneity of leaded light post to go into the light angle through the adjustment and also can improve light utilization ratio.

Drawings

FIG. 1 is a schematic cross-sectional view of a lamp according to a preferred embodiment of the invention;

FIG. 2 is a partial view of the light directing element of the preferred embodiment of FIG. 1;

fig. 3 is a schematic structural diagram of another preferred embodiment of the light guide element of the present invention.

Detailed Description

The light guide element for a lamp according to the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows a lamp according to a preferred embodiment of the present application, which includes a base 6, a lampshade 2, a light guide element 1, and a light source 3. The light sources 3 are arranged on the base 6 in an annular shape, the light guide element 1 comprises an annular light incident surface 101 covering the light sources 3, and the lampshade 2 covers the light guide element 1. The light emitted from the light source 3 enters the light guide element 1 through the light incident surface 101, and then is emitted from the light emitting surface 102 and uniformly strikes the lampshade 2, so that the whole lampshade uniformly emits light, and a good illumination effect is realized.

The light guide element 1 has a solid columnar structure as a whole, a first end surface 11 and a second end surface 12 which are oppositely arranged, and a side surface 13 connecting the two end surfaces. The light incident surface 101 is provided on the first end surface 11, and is a ring surface formed by recessing the first end surface 11 into the light guide element 1. The side surface 13 of the light guide element 1 is a light emitting surface 102. The detailed structure and the light path can be seen in the enlarged view of fig. 2. The light incident surface 101 includes a first optical surface 1011, a second optical surface 1012, and a third optical surface 1013 connected in sequence, where the second optical surface 1012 is disposed opposite to the first end surface 11, and both the first optical surface 1011 and the second optical surface 1013 have one end connected to the first end surface 11 and the other end connected to the second optical surface 1012. The first optical surface 1011 is close to the inner side of the light guide element, and the third optical surface 1013 is disposed at a side close to the light emitting surface 102. Fig. 2 is a cross-sectional view of the light guide element 1, and as shown in fig. 2, in a cross-section passing through the axis of the light guide element, the second optical surface 1012 has a curve in a cross-section, which is a free curve protruding outward from the light guide element 1, and is lower on the side closer to the center than on the side closer to the side surface 13, that is, the distance from the connection point with the first optical surface 1011 to the first end surface 11 is smaller than the distance from the connection point with the third optical surface 1013 to the first end surface 11. Thereby forming a polarizing structure, and the light ray 1 as in fig. 2 is incident through the second optical surface 1012 and then is deflected toward the center of the light guide element. The cross section of the first optical surface 1011 and the third optical surface 1013 in fig. 2 is a straight line, and most of the incident light will directly exit from the bottom of the light guide element 1 if it is not processed, which will result in a phenomenon that the bottom is brighter and the top is darker, so we have two reflective surfaces near the two optical surfaces. The first reflecting surface 103 is disposed adjacent to the first optical surface 1011, and the first reflecting surface 103 is a free-form surface protruding outward from the light guide element 1. Since the light incident surface 101 is annular, the first reflecting surface 103 is disposed inside the first optical surface 1011 and surrounds to form a trumpet-shaped structure which is recessed from the first end surface 11 to the inside of the light guide element 1 and has a gradually reduced transverse cross-section, and the side surface thereof forms the first reflecting surface 103. The trumpet shaped structure is coaxial with the annular plane formed by the light incident surface 101. The side surface of the light guide element 1 near the end surface is provided with a second reflection surface 104, and the second reflection surface 104 surrounds the light incident surface 101 adjacent to the third optical surface 1013. The second reflecting surface 104 is a free-form surface protruding outward from the light guide element 1.

In fig. 2 the light emitted by the light source 3 is split into three portions into the light-guiding element 1. The first partial light ray diagram is marked as light ray 1, enters through the second optical surface 1012, and the polarized light is emitted from the light emitting surface 102 to the upper part of the light guide element 1. The second part of the light ray diagram is marked as light ray 2, which is refracted by the third optical surface 1013 and then reflected by the second reflecting surface 104, and the light ray is emitted above the light guide element 1 and exits through the light exit surface 102. The third part of the light ray diagram is marked as light ray 3, which is refracted by the first optical surface 1011 and then reflected by the first reflective surface 103, and the light ray is emitted above the light guide element 1 and exits through the light exit surface 102.

In order to make the light emitted from the surface of the light guide element 1 more uniform, a diffuse reflection structure is further disposed on the light emitting surface 102, and in this embodiment, the diffuse reflection structure is formed by surface sand blasting. The light guide column mainly solves the problem that light of the light guide column is not uniform up and down, so that improvement is also provided on a diffuse reflection structure, the diffuse reflection structure on the light emitting surface 102 is not uniformly distributed, the distribution density of the diffuse reflection structure is in direct proportion to the distance from the position to the first end surface 11 where the light incident surface is located, namely the farther away from the light incident surface, the larger the distribution density of the diffuse reflection structure is. In the embodiment, the light emitting surface 102 is a non-uniform sand-blasting surface from top to bottom, i.e. the heavy sand is sprayed near the upper end, and the light sand is sprayed at the lower end. Heavy blasting refers to the fact that the volume of sand is large and/or the blasting density is also large.

Fig. 3 shows a light guide element according to another preferred embodiment of the present application, and the basic structure of the light guide element is similar to that of the previous embodiment, and thus the description thereof is omitted here. The difference is that the light emitting surface 102 is different, the light emitting surface 102 in the previous embodiment is a smooth surface, and the light emitting surface 102 in this embodiment is provided with a microstructure 1022 serving as a diffuse reflection structure. The microstructures 1022 are linear grooves surrounding the circumference of the cylinder of the light guide element 1, and are also dense at the top and sparse at the bottom. The optical function is to destroy the total reflection surface, the upper surface is dense, and the light which should be totally reflected and returned to the light guide column originally is emitted out through the microstructure. Thereby making the light emission from the surface of the light guide element 1 uniform. The microstructures 1022 may be pyramidal, hexagonal, spherical, pyramidal, etc., or surface dotted structures, in addition to linear grooves.

Fig. 1 is only a specific application example of the light guide element 1 of the present application, and in other preferred embodiments, the lamp can have various other shapes, and the base 6 and the lampshade 2 can have various shapes, and the connection mode can be flexibly set according to the different shapes. In addition, the light guide element 1 can also be used for a ceiling lamp, the ceiling lamp can comprise a plurality of lamp holders which are connected with each other through a lamp arm, each lamp holder is provided with the light guide element 1, and a lampshade can be arranged outside the lamp holder or not.

The foregoing description of the preferred embodiments of the present invention has been presented for purposes of illustration and description and is not intended to be exhaustive or to limit the invention to the precise form disclosed, and it will be apparent that numerous modifications and variations may be made thereto, which will be apparent to those skilled in the art, and are intended to be included within the scope of the invention as defined by the following claims.