CN210860976U

CN210860976U - Total reflection ultrathin backlight lens

Info

Publication number: CN210860976U
Application number: CN201921411929.8U
Authority: CN
Inventors: 王生见
Original assignee: Shenzhen Yongfuxing Technology Co ltd
Current assignee: Shenzhen Yongfuxing Technology Co ltd
Priority date: 2019-08-28
Filing date: 2019-08-28
Publication date: 2020-06-26
Anticipated expiration: 2029-08-28

Abstract

The utility model discloses an ultra-thin lens in a poor light of total reflection, including the level crossing, one side of level crossing is provided with multiunit unit lens, this ultra-thin lens in a poor light of total reflection, the light refraction of the middle part of Fresnel lens structure through in the recess goes out the LED lamp, and with level crossing vertically direction, and the LED lamp is then refracted to the plane of reflection by straight line and convex arc department to the light of dispersing all around, then go out by the plane of reflection, because there is not the setting of convex arc, the LED lamp is then required great plane of reflection on will all needing to utilize to the scattered light all around, therefore the thickness of lens is thicker, and the picture pitch arc just can produce great refraction angle in other words to a convex mirror, reduce required plane of reflection, thereby the thickness of the lens that reduces, because thickness reduces so the energy loss of light just also reduced.

Description

Total reflection ultrathin backlight lens

Technical Field

The utility model relates to a lens technical field specifically is an ultra-thin lens in a poor light of total reflection.

Background

In the technical field of illumination, because the LED light source has the advantages of low energy consumption, strong applicability, high stability, short response time, no pollution to the environment, multicolor luminescence and the like, the LED light source gradually replaces the traditional light source and is widely applied to various illumination occasions. With the development of LED illumination application, people have higher and higher requirements on the quality of light spots, and the light spots are optimized by adopting a total reflection type lens.

However, the TIR total reflection lens in the prior art is generally made of a transparent optical material, and the energy consumed by the light emitted from the light source in the path of the material is relatively large, and the fresnel lens is made of a transparent optical material, and in the light emitted from the light source, the light in a partial enclosed angle solid angle is converted into parallel light after being refracted by the fresnel lens, and the thickness of the fresnel lens is uniform and the overall thickness of the fresnel lens is relatively small in the manufacturing process, so that the loss of the energy of the light source in the path of the material of the fresnel lens is relatively small, but the fresnel lens can only refract and utilize α of the light in a partial enclosed angle solid angle emitted from the light source, and the rest of the light is wasted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an ultra-thin lens in a poor light of total reflection to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a total reflection ultrathin backlight lens comprises a plane mirror, wherein a plurality of groups of unit lenses are arranged on one side of the plane mirror.

Preferably, one side of the unit lens is provided with a groove, the bottom of the groove is provided with a Fresnel lens structure, and one side of the unit lens, which is far away from the plane mirror, is a reflection arc surface.

Preferably, one section of the cross section of the side wall of the groove is a straight line, and the other section of the cross section of the side wall of the groove is a convex arc line.

Preferably, the unit lens is a solid of revolution.

Preferably, the outer edge of the unit lens is provided with a prismatic notch, and a triangular groove is formed inside the unit lens.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a fresnel lens structure in the recess refracts away the light of the middle part of LED lamp, and with level crossing vertically direction, and the LED lamp is then by straight line and convex arc department refraction reflecting surface to the light of dispersing all around, then reflect away by the reflecting surface, because there is not the setting of convex arc, then need great reflecting surface to the light of scattering all around to the utilization, consequently, the thickness of lens is thicker, and the figure pitch arc just is equivalent to a convex mirror and can produce great refraction angle, reduce required reflecting surface, thereby the thickness of the lens that reduces, so the energy loss of light just also is reduced because thickness reduces.

2. The utility model discloses set up the prism breach and set up the triangular groove in inside and refract partly light that surpasss the plane of reflection outside the outer edge of unit lens, the prism breach just is the refraction that the prism was put the light to with the triangular groove, can make the light refract into the direction of perpendicular to level crossing equally, the improvement on the big degree of success lens utilization ratio to light.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a view showing a structure of a unit lens;

FIG. 3 is a half sectional view of a unit lens;

fig. 4 is a partial light source refraction diagram of a unit lens.

In the figure: 1-a plane mirror; 2-a unit lens; 3-a groove; 4-a fresnel lens structure; 5-straight line; 6-convex arc line; 7-prismatic notch; 8-a triangular groove; 9-reflective cambered surface.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a total reflection ultrathin backlight lens comprises a plane mirror 1, wherein a plurality of groups of unit lenses 2 are arranged on one side of the plane mirror 1.

A groove 3 is formed in one side of the unit lens 2, a Fresnel lens structure 4 is arranged at the bottom of the groove 3, and a reflecting arc surface 9 is arranged on one side, far away from the plane mirror 1, of the unit lens 2.

One section of the cross section of the side wall of the groove 3 is a straight line 5, and the other section of the cross section of the side wall of the groove is a convex arc line 6.

The unit lens 2 is a solid of revolution.

Prismatic notches 7 are formed in the outer edges of the unit lenses 2, and triangular grooves 8 are formed in the unit lenses 2.

The working principle is as follows: the LED light source is arranged on the central axis of the groove 3, light on a certain angle in the middle can be refracted into parallel light by the Fresnel lens structure 4, but because the structure of the LED light source limits the LED light source to be only capable of utilizing light rays in the central area of the light source, light on the periphery can be diverged from the side surface, because the refractive index between air and the lens is different, a part of the diverged light can be refracted to the reflecting arc surface 9 from the straight line 5 of the cross section, then the light is reflected to be close to the parallel light, a part of the scattered light can exceed the area of the reflecting arc surface 9 due to the lower thickness of the lens, therefore, the refraction angle between the light source and the reflecting arc surface 9 needs to be increased, therefore, one side of the side wall of the groove 3 close to the Fresnel lens structure 4 is arranged to be a convex arc surface, the cross section is a convex arc line 6, so that the light can be refracted to the reflecting arc surface 9 by the, the light emitted from the light source is irradiated to the straight line section of the side surface of the unit lens 2 close to the plane mirror 1 and then scattered to the outside of the lens, because a part of the light source is not used, the utilization rate is reduced, the irradiated parallel light is darker, therefore, the prism-shaped notch 7 and the triangular groove 8 are arranged on the lens to form a triangular prism structure which refracts the light to the horizontal light, because the light of the structure is the air entering the groove from the lens and then entering the lens again, the refraction is opposite to that of the triangular prism, because the unit lens 2 is a solid of revolution, the straight line 5 convex arc 6 is a curved surface and a convex arc surface of revolution, and the prism-shaped notch 7 and the triangular groove are both annular.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a totally reflected ultra-thin backlight lens, includes level crossing (1), its characterized in that: one side of level crossing (1) is provided with multiunit cell lens (2), one side of cell lens (2) is seted up fluted (3), recess (3) bottom is provided with fresnel lens structure (4), cell lens (2) are kept away from level crossing (1) one side and are reflection cambered surface (9), one section of the lateral wall cross-section of recess (3) is straight line (5), and another section is convex arc line (6), the outside edge of cell lens (2) is provided with prismatic notch (7), the inside of cell lens (2) is provided with triangular groove (8).

2. The ultra-thin backlight lens with total reflection as claimed in claim 1, wherein: the unit lens (2) is a revolving body.