CN210860978U

CN210860978U - Backlight lens and backlight module

Info

Publication number: CN210860978U
Application number: CN201921879120.8U
Authority: CN
Inventors: 陈林
Original assignee: Shenzhen Mynice Photoelectric Co ltd
Current assignee: Shenzhen Mynice Photoelectric Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-06-26
Anticipated expiration: 2029-10-31
Also published as: WO2021082508A1

Abstract

The utility model provides a lens in a poor light and backlight unit, lens in a poor light include the lens body, be provided with the cavity that is used for the holding light source on the lens body, the bottom ring of lens body is equipped with a plurality of groups of microstructure group, every group microstructure group all includes a plurality of edges and keeps away from the microstructure that the direction of cavity set gradually, and a plurality of the maximum cross section width of microstructure is along keeping away from the direction of cavity increases in proper order, the polyhedron of the irregular optical surface of microstructure for having a plurality of asymmetric settings. The utility model provides a lens in a poor light and backlight unit for the light outgoing direction of each irregular optical surface is all inequality, not only can improve luminous efficiency, can prevent the bright speck moreover from appearing.

Description

Backlight lens and backlight module

Technical Field

The utility model belongs to the technical field of the lens, more specifically say, relate to a lens in a poor light and backlight unit.

Background

The current LED (Light-Emitting Diode) backlight lens is widely used in the fields of television backlight illumination and advertisement sign lamp box illumination. The backlight lens has the function that after light emitted by the LED is refracted by the lens, small light spots of an LED light source are enlarged into large light spots, the using amount of LED lighting appliances at an application end is reduced, and therefore the purpose of saving cost is achieved. However, due to the interface reflection of the outer curved surface of the lens, a small part of light rays are reflected by the outer curved surface and then are reflected back to the PCB and then are reflected back to the receiving surface by the PCB, so that bright spots appear in the center of the front surface of the illuminating surface.

To solve this problem, microstructures are typically provided on the bottom plane of the lens. However, the microstructures in the prior art are generally regular structures, and have low light extraction efficiency and are easy to generate bright spots.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lens in a poor light to solve the light-emitting efficiency that lens in a poor light exists among the prior art and the technical problem of bright spot appears easily.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a lens in a poor light, includes the lens body, be provided with the cavity that is used for the holding light source on the lens body, the bottom ring of lens body is equipped with a plurality of groups of microstructure group, every group microstructure group all includes a plurality of along keeping away from the microstructure that the direction of cavity set gradually, and is a plurality of the maximum cross-sectional width of microstructure increases along keeping away from the direction of cavity in proper order, the polyhedron of the irregular optical surface of microstructure for having a plurality of asymmetric settings.

Further, the polyhedron is a pyramid.

Further, a plurality of the pyramids are arranged in an arc shape along a direction away from the concave cavity.

Further, the pyramid is a rectangular pyramid which comprises four irregular optical surfaces, and the four irregular optical surfaces are different.

Further, the sectional width of each of the pyramids gradually increases in a direction away from the cavity.

Further, the polyhedron is a prism.

Further, each of the prism bodies has a sectional width gradually increasing in a direction away from the cavity.

Further, the cross-sectional profile shape of the prism body is a polygon.

Further, the polyhedron is arranged in a protruding mode or a concave mode from the bottom of the lens body.

Another object of the present invention is to provide a backlight module, which includes a backlight lens and a light source installed in the concave cavity of the backlight lens, wherein the backlight lens is the above-mentioned backlight lens.

The utility model provides a lens in a poor light and backlight unit's beneficial effect lies in: compared with the prior art, the utility model discloses lens in a poor light is equipped with a plurality of groups microstructure group through the bottom ring at the lens body, every group microstructure group all includes a plurality of microstructures that set gradually along the direction of keeping away from the cavity, and the maximum cross-sectional width of microstructure increases along the direction of keeping away from the cavity in proper order, and set up the microstructure into the polyhedron of the irregular optical surface that has a plurality of asymmetric settings, thereby make the light outgoing direction of each irregular optical surface all inequality, not only can improve light-emitting efficiency, and can prevent the bright spot from appearing.

Drawings

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

Fig. 1 is a schematic perspective view of a backlight lens according to a first embodiment of the present invention;

fig. 2 is a side view of a backlight lens according to a first embodiment of the present invention;

FIG. 3 is a sectional view taken along line A-A of FIG. 2;

fig. 4 is a light path diagram of a backlight lens according to a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of a microstructure group according to a first embodiment of the present invention;

fig. 6 is a schematic structural diagram of a single microstructure according to a first embodiment of the present invention;

fig. 7 is a light path diagram of a single microstructure according to a first embodiment of the present invention;

fig. 8 is an optical path diagram of one of the irregular optical surfaces of a single microstructure according to the first embodiment of the present invention;

fig. 9 is an optical path diagram of another irregular optical surface of a single microstructure according to the first embodiment of the present invention;

fig. 10 is a schematic perspective view of a backlight lens according to a second embodiment of the present invention;

fig. 11 is a perspective view of a backlight lens according to a second embodiment of the present invention;

fig. 12 is a side view of a backlight lens according to a second embodiment of the present invention;

FIG. 13 is a sectional view taken along line B-B of FIG. 12;

fig. 14 is a light path diagram of a backlight lens according to a second embodiment of the present invention;

fig. 15 is a schematic structural diagram of a single microstructure according to a second embodiment of the present invention;

fig. 16 is an optical path diagram of a single microstructure according to a second embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10-a lens body; 11-a cavity; 20-a light source; 30-group of microstructures; 31-a microstructure; 32-irregular optical surface; 33-straight side; 34-arc edge.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

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 be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship 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 device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to fig. 16, a backlight lens according to the present invention will be described. The utility model provides a lens in a poor light, including lens body 10. The lens body 10 is provided with a cavity 11, and the cavity 11 is used for accommodating the light source 20. The lens body 10 has a plurality of microstructure groups 30 around the bottom thereof, and in the present embodiment, the microstructure groups 30 are integrally formed with the lens body 10. Each microstructure group 30 includes a plurality of microstructures 31, the microstructures 31 are sequentially arranged along the direction away from the cavity 11, and the maximum cross-sectional width of the microstructures 31 is sequentially increased along the direction away from the cavity 11, as shown in fig. 6, that is, the microstructures 31 are gradually changed, the maximum cross-sectional width of the microstructure 31 close to the cavity 11 is smaller than the maximum cross-sectional width of the microstructure 31 away from the cavity 11, so that each microstructure 31 in the microstructure group 30 is different, the light emitting directions of the microstructures 31 are different, bright spots can be effectively prevented, the utilization rate of light is increased, and the light emitting effect is improved. Wherein "sectional width" refers to a width in a direction perpendicular to a direction away from the cavity 11. This microstructure 31 is the polyhedron, and this polyhedron has a plurality of asymmetric irregular optical surface 32 that set up to make the light outgoing direction of each irregular optical surface 32 all inequality, not only can improve luminous efficacy, can prevent the bright speck moreover.

The utility model provides a lens in a poor light, compared with the prior art, the utility model discloses a lens in a poor light is equipped with a plurality of groups micro-structure group 30 through the bottom ring at lens body 10, every group micro-structure group 30 all includes a plurality of micro-structures 31 that set gradually along the direction of keeping away from cavity 11, and the maximum cross section width of micro-structure 31 increases along the direction of keeping away from cavity 11 in proper order, and set up micro-structure 31 as the polyhedron of the irregular optical surface 32 that has a plurality of asymmetric settings, thereby make the light outgoing direction of each irregular optical surface 32 all inequality, not only can improve luminous efficiency, and can prevent the bright spot from appearing.

Further, referring to fig. 1 to 6, as an embodiment of the backlight lens provided by the present invention, the polyhedron is protruded from the bottom of the lens body 10. It should be noted that the polyhedron may also be recessed from the bottom of the lens body 10, which may also achieve a good light extraction effect.

Further, referring to fig. 1 to 6 together, as a specific implementation of the backlight lens according to the first preferred embodiment of the present invention, the polyhedron may be a pyramid, and the occurrence of bright spots can be effectively avoided by using the microstructure 31 of the pyramid.

Further, referring to fig. 1 to fig. 6 together, as a specific implementation of the backlight lens according to the first preferred embodiment of the present invention, in the present embodiment, each microstructure group 30 includes six microstructures 31, and the maximum cross-sectional widths of the six microstructures 31 increase in sequence along a direction away from the cavity 11. I.e. each set of microstructures 31 comprises six pyramids, the maximum cross-sectional width of which increases successively in the direction away from the cavity 11.

Further, referring to fig. 1 and 5 together, as a specific implementation of the backlight lens according to the first preferred embodiment of the present invention, a plurality of pyramids are arranged in an arc shape along a direction away from the cavity 11, as shown in fig. 6. Through being the arc with a plurality of pyramids and arranging, can realize better light-emitting effect. It should be noted that the arrangement of the pyramids is not limited to this, for example, in other preferred embodiments of the present invention, the plurality of pyramids may be arranged in a straight line.

Further, please refer to fig. 6 to 9 together, as a specific implementation manner of the backlight lens according to the first preferred embodiment of the present invention, the pyramid is a rectangular pyramid, the rectangular pyramid includes four irregular optical surfaces 32, the four irregular optical surfaces 32 are different, as shown in fig. 8 and 9, the same light incident direction is different, because the shape or size of each irregular optical surface 32 is different, the light emitting direction of each irregular optical surface 32 is different, and the formation of bright spots is prevented. It should be noted that the pyramid can also be arranged according to actual needs, for example, in other preferred embodiments of the present invention, the pyramid can also be arranged as a pentagonal pyramid or a hexagonal pyramid, etc.

Further, referring to fig. 6 to 9, as a specific implementation of the backlight lens according to the first preferred embodiment of the present invention, the width of the cross section of each pyramid is gradually increased along the direction away from the cavity 11, so as to achieve a better light-emitting effect.

Further, referring to fig. 6 to 9, as an embodiment of the backlight lens according to the first preferred embodiment of the present invention, the rectangular pyramid further includes a bottom surface (not shown), the bottom surface has four sides, and the four irregular optical surfaces 32 are respectively connected to the four sides of the bottom surface. The four sides include two straight sides 33 arranged oppositely and two arc sides 34 arranged oppositely, so that each irregular optical surface 32 is an asymmetric surface, and the light emitting directions of each irregular optical surface 32 are different. It should be noted that in other preferred embodiments of the present invention, the four sides may be all straight sides, or all four sides may be arc sides.

Further, referring to fig. 10 to 16, as a specific implementation of the backlight lens according to the second preferred embodiment of the present invention, the polyhedron is a prism. By using prismatic microstructures 31, bright spots are also effectively avoided.

Further, referring to fig. 10 to 13 together, as a specific implementation of the backlight lens according to the second preferred embodiment of the present invention, in the present embodiment, each microstructure group 30 includes two microstructures 31, and the maximum cross-sectional widths of the two microstructures 31 increase in sequence along a direction away from the cavity 11. That is, each of the microstructure groups 30 includes two prisms disposed in a direction away from the cavity 11, and the maximum sectional widths of the two prisms increase in sequence in the direction away from the cavity 11.

Further, referring to fig. 15 to 16, as an embodiment of the backlight lens according to the second preferred embodiment of the present invention, the cross-sectional width of each prism is gradually increased along a direction away from the cavity 11. When light enters the prism, the cross-sectional width of the prism is gradually increased along the direction away from the cavity 11, so that the prism has an outward inclination angle, and the light reflection direction can be reflected from the end with the small cross-sectional width to the end with the large cross-sectional width, so that the light reflection times are more, and the utilization rate of the light is effectively improved, as shown in fig. 16.

Further, referring to fig. 15 to 16, as a specific implementation of the backlight lens according to the second preferred embodiment of the present invention, the cross-sectional profile of the prism is polygonal, for example, it can be triangular, that is, the prism is a triangular prism. It should be noted that the prism body can be arranged according to actual needs, for example, in other preferred embodiments of the present invention, the prism body can be arranged as a quadrangular prism or a pentagonal prism, etc., that is, the cross-sectional profile shape of the prism body can also be a quadrangle or a pentagon, etc.

Referring to fig. 1 to 16, the present invention further provides a backlight module including a backlight lens and a light source 20 installed in the cavity 11 of the backlight lens. The utility model discloses a lens in a poor light be as the lens in a poor light in above embodiment, so this lens in a poor light's specific structure is no longer repeated here.

The utility model provides a backlight module, lens in a poor light as in the above embodiment has been adopted, therefore, be equipped with a plurality of groups of micro-structure group 30 through the bottom ring at lens body 10, every group micro-structure group 30 all includes a plurality of micro-structures 31 that set gradually along the direction of keeping away from cavity 11, and micro-structure 31's the biggest cross-sectional width increases along the direction of keeping away from cavity 11 in proper order, and set up micro-structure 31 as the polyhedron of the irregular optical surface 32 that has a plurality of asymmetric settings, thereby make the light outgoing direction of each irregular optical surface 32 all inequality, not only can improve luminous efficiency, and can prevent the bright spot from appearing.

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

Claims

1. A backlight lens, characterized in that: the lens comprises a lens body, be provided with the cavity that is used for the holding light source on the lens body, the bottom ring of lens body is equipped with a plurality of groups of microstructure group, every group microstructure group all includes a plurality of edges and keeps away from the microstructure that the direction of cavity set gradually, and is a plurality of the maximum cross-sectional width of microstructure increases along the direction of keeping away from the cavity in proper order, the polyhedron of the irregular optical surface of microstructure for having a plurality of asymmetric settings.

2. The backlight lens of claim 1, wherein: the polyhedron is a pyramid.

3. The backlight lens of claim 2, wherein: the pyramids are arranged in an arc shape along the direction far away from the concave cavity.

4. The backlight lens of claim 2, wherein: the pyramid is a rectangular pyramid which comprises four irregular optical surfaces, and the four irregular optical surfaces are different.

5. The backlight lens of claim 2, wherein: the cross-sectional width of each of the pyramids increases gradually in a direction away from the cavity.

6. The backlight lens of claim 1, wherein: the polyhedron is a prism.

7. The backlight lens of claim 6, wherein: the cross-sectional width of each prism body gradually increases along the direction away from the concave cavity.

8. The backlight lens of claim 6, wherein: the cross-sectional profile shape of the prism is a polygon.

9. The backlight lens of any of claims 1-8, wherein: the polyhedron is arranged from the bottom of the lens body in a protruding or concave mode.

10. Backlight unit, including backlight lens and install in the light source in backlight lens's the cavity, its characterized in that: the backlight lens is as claimed in any one of claims 1 to 9.