CN213178201U

CN213178201U - Backlight lens with installation collimation structure

Info

Publication number: CN213178201U
Application number: CN202022395691.3U
Authority: CN
Inventors: 南基学
Original assignee: Yejia Optical Technology Guangdong Corp
Current assignee: Yejia Optical Technology Guangdong Corp
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-05-11
Anticipated expiration: 2030-10-23

Abstract

The utility model provides a lens in a poor light with installation collimation structure, including the lens body, the upper and lower of lens body is light-emitting curved surface and compound plane of reflection respectively, the bottom of lens body is equipped with the light chamber of putting that is located compound plane of reflection center, it is formed with into the light curved surface to put between light chamber and the lens body, the top of going into the light curved surface is equipped with spotlight bellying, the center department of light-emitting curved surface is equipped with the arc depressed part, it is filled with the printing opacity obturator to put the light intracavity, the bottom of printing opacity obturator is equipped with the constant head tank, it has common center pin with the constant head tank to put the light chamber, be equipped with the light source in the constant head tank. The utility model can ensure that the central optical axis of the light source is aligned with the central axis of the lens body, the installation and operation are convenient, and the alignment is accurate; the arc-shaped concave part is matched with the light-gathering convex part below the arc-shaped concave part, so that light rays of the central part can be effectively adjusted, and the brightness uniformity of formed light spots can be effectively improved.

Description

Backlight lens with installation collimation structure

Technical Field

The utility model relates to a lens in a poor light specifically discloses a lens in a poor light with installation collimation structure.

Background

The backlight lens is also called as a TV lens and a diffusion lens, one backlight lens is usually used corresponding to a single LED chip, light beams can be diffused and homogenized, and a plurality of combinations are applied to the backlight module to form a surface light emitting effect, so that the backlight lens can be used for display screen products such as liquid crystal televisions and the like.

The backlight lens in the prior art is generally arranged on a circuit board and used in cooperation with a light source, and the backlight lens is generally connected with the circuit board in an alignment mode through a mounting pin, but a certain error exists in the connection mode, so that the central optical axis of the light source is easily deviated from the central axis of the backlight lens, the actually obtained light distribution effect is greatly different from the designed light distribution effect, and the effect of application requirements cannot be achieved.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a backlight lens with an installation collimation structure for solving the problems in the prior art, so that a light source can be conveniently aligned with a lens body to be accurately installed, and a light distribution effect meeting design requirements can be obtained during application.

In order to solve the prior art problem, the utility model discloses a lens in a poor light with installation collimation structure, be n including the refracting index₁The lens body, the upper and lower of lens body is light-emitting curved surface and compound plane of reflection respectively, and the bottom of lens body is equipped with the light cavity of putting that is located compound plane of reflection center, puts and is formed with the income light curved surface between light cavity and the lens body, and the top of income light curved surface is equipped with spotlight bellying, and the center department of light-emitting curved surface is equipped with arc depressed part, puts and fills in the light cavity and is equipped with the refractive index and be n₂N is a light-transmitting filler of₂<n₁The bottom of the light-transmitting filling body is provided with a positioning groove, the light placing cavity and the positioning groove have a common central shaft, a light source is arranged in the positioning groove, and the inner walls of the positioning groove are tightly attached to the surfaces of the light source.

Furthermore, the composite reflecting surface is a Fresnel structure surface or a light guide mesh point structure surface.

Further, the light-transmitting filling body is an optical plastic body.

Furthermore, the opening edge of the positioning groove is provided with a guide inclined plane.

Furthermore, a lens seat is fixed below the lens body, and an anti-slip glue layer covers the bottom surface of the lens seat.

The utility model has the advantages that: the utility model discloses a backlight lens with an installation collimation structure, which can ensure that the central optical axis of a light source is aligned with the central axis of a lens body by arranging a light-transmitting filler with a positioning groove in a light placing cavity, is convenient to install and operate and accurate in alignment, and can obtain a light distribution effect meeting design requirements when in use; in addition, the arc-shaped concave part is matched with the light-gathering convex part below the arc-shaped concave part, so that light rays of the central part can be effectively adjusted, the brightness uniformity of formed light spots can be effectively improved, and the energy utilization rate of the whole structure is high.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of another embodiment of the present invention.

Fig. 3 is a schematic diagram of the optical path structure of the present invention.

The reference signs are: the lens comprises a lens body 10, a light-emitting curved surface 11, a composite reflecting surface 12, a light-placing cavity 13, a light-gathering convex part 14, an arc-shaped concave part 15, a light-transmitting filling body 20, a positioning groove 21, a guide inclined plane 22, a light source 30, a lens seat 40 and an anti-slip glue layer 41.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Refer to fig. 1 to 3.

The embodiment of the utility model discloses lens in a poor light with installation collimation structure, be n including the refracting index₁The lens body 10 is provided with a light-emitting curved surface 11 and a composite reflection surface 12 respectively at the upper part and the lower part of the lens body 10, the light-emitting curved surface 11 is an aspheric surface protruding upwards, the bottom of the lens body 10 is provided with a light-placing cavity 13 positioned at the center of the composite reflection surface 12, a light-entering curved surface is formed between the light-placing cavity 13 and the lens body 10, the light-entering curved surface is an aspheric surface, the top of the light-entering curved surface is provided with a light-gathering convex part 14, and the light14 is to keeping away from the convex cambered surface structure of one side of light-emitting curved surface 11, and the center department of light-emitting curved surface 11 is equipped with arc depressed part 15, and arc depressed part 15 is the radius of curvature from the center to the gradually increasing curved surface all around, can effectively avoid center department to form the bright spot of luminance too high, and it is filled with the refracting index to be n in putting light chamber 13 and is filled with₂20, n of a transparent filler₂<n₁The utility model discloses a lens, ensure that light can obtain effectual refraction when getting into the lens 10 from the lens obturator, the bottom of printing opacity obturator 20 is equipped with constant head tank 21, it has common center pin with constant head tank 21 to put light chamber 13, it possesses common center pin equally with arc depressed part 15 to put light chamber 13, be equipped with light source 30 in the constant head tank 21, preferably, light source 30 is the LED chip, each surface of light source 30 is hugged closely to each inner wall of constant head tank 21, the tank bottom of constant head tank 21 is hugged closely to the light emitting area of light source 30, can ensure that the light that light source 30 sent can directly get into printing opacity obturator 20, avoid the light that light source 30 sent to take place unnecessary refraction when reacing printing opacity obturator 20, can also ensure the positioning effect of.

When the lens body 10 is used, the light source 30 is aligned and inserted into the positioning groove 21, and because each inner wall of the positioning groove 21 is tightly attached to each surface of the light source 30 and the light placing cavity 13 and the positioning groove 21 have a common central axis, the central optical axis of the light source 30 can be effectively ensured to pass through the central axis of the light placing cavity 13, so that the light source 30 can be effectively ensured to be reliably installed and aligned relative to the lens body 10; in addition, the light that light source 30 sent can obtain effectual dispersing through going into light curved surface and light-emitting curved surface 11 in proper order, and arc depressed part 15 can cause the regional luminance that central department has the subtotal when dispersing to the light not enough, and spotlight bellying 14 can realize certain the effect of assembling with the light of process to above central department luminance not enough regional realization light filling, thereby effectively improve the even effect of whole grading, compound plane of reflection 12 can further improve the utility model discloses a light energy utilization ratio.

In this embodiment, the composite reflective surface 12 is a fresnel structure surface or a light guide dot structure surface, the fresnel structure surface includes a plurality of fresnel rings, and when light reaches the fresnel structure surface at an incident angle greater than a critical angle of total reflection, the light can be reflected to exit from the light exit curved surface 11 due to total reflection; the light guide dot structure surface is usually formed by splicing a plurality of micro concave lenses, and also has the effect of reflecting light rays from the side surface to the front surface for outgoing.

In this embodiment, the light-transmitting filling body 20 is an optical plastic body, the optical plastic has good optical performance, and the light-transmitting filling body 20 can be shaped by a mold, so that the processing is convenient.

In this embodiment, the opening edge of the positioning groove 21 is provided with the guiding inclined plane 22, and the guiding inclined plane 22 makes the opening area of the positioning groove 21 larger than the area of the groove bottom, so that when the light source 30 is installed to the positioning groove 21, the guiding effect can be effectively improved, and the installation operation is convenient.

In this embodiment, a lens holder 40 is fixed under the lens body 10, a bottom surface of the lens holder 40 is covered with an anti-slip glue layer 41, reliable positioning between the backlight lens and the circuit board can be achieved through the anti-slip glue layer 41 matching with the positioning groove 21, the installation and detachment operation is convenient, the installation structure is stable and reliable, the sealing and waterproof performance can be improved, and preferably, the anti-slip glue layer 41 is a rubber layer.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A backlight lens with a mounting collimating structure, comprising a refractive index n₁The lens body (10), be light-emitting curved surface (11) and compound plane of reflection (12) respectively about the lens body (10), the bottom of the lens body (10) is equipped with and is located put light chamber (13) at compound plane of reflection (12) center, put light chamber (13) with be formed with the income light curved surface between the lens body (10), the top of going into the light curved surface is equipped with spotlight bellying (14), light-emitting curved surface(11) Is provided with an arc-shaped concave part (15), and the light placing cavity (13) is filled with a refractive index n₂N of a light-transmitting filler (20), n₂<n₁The bottom of the light-transmitting filling body (20) is provided with a positioning groove (21), the light placing cavity (13) and the positioning groove (21) have a common central shaft, a light source (30) is arranged in the positioning groove (21), and each inner wall of the positioning groove (21) is tightly attached to each surface of the light source (30).

2. The backlight lens with a mounted collimating structure as claimed in claim 1, wherein the composite reflecting surface (12) is a fresnel structure surface or a light guide dot structure surface.

3. A backlight lens with a mounted collimating structure, as claimed in claim 1, characterized in that the light-transmissive filling body (20) is an optical plastic body.

4. A backlight lens with a mounting collimating structure according to claim 1, characterized in that the opening edge of the positioning groove (21) is provided with a guide slope (22).

5. The backlight lens with the installation alignment structure as claimed in claim 1, wherein a lens holder (40) is fixed under the lens body (10), and the bottom surface of the lens holder (40) is covered with an anti-slip glue layer (41).