CN210776108U - Lens for television backlight module - Google Patents

Abstract

The utility model provides a lens for TV set backlight unit, including the lens body and light source, the bottom of the lens body is equipped with puts the light cavity, and the light source is located puts the light cavity, and the top of the lens body is equipped with the plane of reflection of central undercut, and the side of the lens body is around having annular first light-emitting portion and annular second light-emitting portion, and first light-emitting portion is located the top of second light-emitting portion, and second light-emitting portion is including a plurality of scattering microstructure that link to each other of hugging closely, and scattering microstructure is for being the inside sunken structure of cambered surface. The utility model discloses one side of keeping away from the plane of reflection at the lens body is provided with sunken scattering microstructure, when being applied to the liquid crystal TV set, can reduce the side department emergence of keeping away from the liquid crystal module on the lens body of light, can effectively ensure that most light all is close to one side emergence of the plane of reflection of liquid crystal module, and the light-emitting visual angle is good, and can effectively improve the homogeneity of facula luminance everywhere.

Description

A lens for TV backlight module

technical field

The utility model relates to a lens, and specifically discloses a lens used for a backlight module of a television.

Background technique

The backlight module is one of the key components of the LCD panel. Its function is to supply sufficient brightness and evenly distributed light sources, so that it can display images normally.

In the TV backlight module, the structure applied to the lens is mostly a direct-type backlight module. After the light source passes through the lens, a light distribution effect with relatively uniform brightness is formed. In the prior art, the lenses used for the direct-lit backlight module of TV sets mainly adjust the light by refraction at the light-incident surface and the light-emitting surface, and some lenses are provided with a reflective surface on the top surface, and some of the light rays are transmitted from the reflective surface. After being reflected into the lens body, part of the light is refracted from the reflective surface, but the uniform light performance of the lens in the prior art is not good enough.

Utility model content

Based on this, it is necessary to provide a lens for the backlight module of a TV set in view of the problems of the prior art, which can effectively improve the uniformity of light output, and has a good light output angle.

In order to solve the problems of the prior art, the utility model discloses a lens for a backlight module of a television set, which comprises a lens body and a light source. The top of the lens body is provided with a reflective surface with a downwardly recessed center. The side of the lens body is surrounded by an annular first light emitting part and an annular second light emitting part. The first light emitting part is located above the second light emitting part, and the second light emitting part includes: A number of scattering microstructures are closely connected, and the scattering microstructures are inwardly concave structures in an arc surface.

Further, a fluorescent layer is filled between the light-setting cavity and the light source.

Further, a raised portion is provided at the center of the reflective surface.

Further, the reflective surface is covered with a frosted layer.

Further, the bottom of the lens body is fixed with a base, and the base is covered with a reflective layer.

Further, the bottom of the base is fixed with positioning feet.

The beneficial effects of the utility model are as follows: the utility model discloses a lens for a backlight module of a television set, which adjusts the light from the light source by means of reflection and refraction, and a recess is arranged on the side of the lens body away from the reflective surface. The scattering microstructure, when applied to LCD TVs, can reduce the probability of light exiting from the side of the lens body away from the liquid crystal component, and can effectively ensure that most of the light exits from the side close to the reflective surface of the liquid crystal component. Good, and can effectively improve the uniformity of brightness throughout the spot.

Description of drawings

Fig. 1 is the bottom view structure schematic diagram of the utility model.

FIG. 2 is a schematic view of the front structure of the utility model.

Fig. 3 is a schematic diagram of the cross-sectional structure of the utility model along A-A' in Fig. 1 .

FIG. 4 is a schematic diagram of the optical path structure of the present invention.

Reference numerals are: lens body 10 , light-setting cavity 11 , fluorescent layer 111 , reflecting surface 12 , convex portion 121 , frosted layer 122 , first light-emitting portion 13 , second light-emitting portion 14 , scattering microstructure 141 , light source 20. Base 30, reflective layer 31, positioning feet 32.

Detailed ways

In order to further understand the features, technical means, and specific goals and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

Refer to Figures 1 to 4.

The embodiment of the present utility model discloses a lens for a TV backlight module, which includes a lens body 10 and a light source 20. Preferably, the light source 20 is an LED lamp bead. Located in the light cavity 11, the light emitting surface of the light source 20 is upward, the top of the lens body 10 is provided with a reflective surface 12 with a downwardly recessed center, and the side surface of the lens body 10 is surrounded by an annular first light emitting part 13 and an annular second light emitting part 13. The light emitting portion 14, the first light emitting portion 13 is located above the second light emitting portion 14, that is, the first light emitting portion 13 is arranged close to the reflective surface 12, the second light emitting portion 14 is arranged near the light housing cavity 11, and the first light emitting portion 13 and the The second light emitting portion 14 forms a complete side surface of the lens body 10. The second light emitting portion 14 includes a plurality of scattering microstructures 141 that are closely connected to each other. The scattering microstructures 141 are arcuately recessed structures. The structure is similar to the honeycomb structure.

When applied to an LCD TV, the reflective surface 12 is located on the side close to the liquid crystal assembly, the inner wall of the light cavity 11 is the light incident surface, and the reflective surface 12, the first light emitting part 13 and the second light emitting part 14 are all light emitting surfaces. The light enters the lens body 10 from the inner wall of the light-setting cavity 11 , part of the light exits from the reflection surface 12 , and part of the light exits from the reflection surface 12 to the first light exit part 13 ; The scattering microstructure 141 is reflected and refracted, most of the light reaching the scattering microstructure 141 is reflected by its arc structure, and only a small part of the light is refracted out, and the light reflected on the scattering microstructure 141 can effectively adjust its The output direction of the lens body 10 is directed toward the front side of the lens body 10. The front side of the lens body 10 is the side of the reflective surface 12, so as to ensure a good light-emitting angle of the lens body 10 as a whole, and can effectively improve the brightness of the light spot to be sufficient and uniform.

The utility model adjusts the light from the light source by means of reflection and refraction, and a concave scattering microstructure 141 is arranged on the side of the lens body 10 away from the reflective surface 12. When applied to a liquid crystal TV, the light from the lens body can be reduced. The probability of emitting from the side away from the liquid crystal module on 10 can effectively ensure that most of the light is emitted from the side close to the reflective surface of the liquid crystal module, with a good viewing angle and can effectively improve the uniformity of brightness throughout the spot.

In this embodiment, a fluorescent layer 111 is filled between the light-setting cavity 11 and the light source 20. The fluorescent layer 111 is made of fluorescent glue. The fluorescent layer 111 can adjust the color of the light, etc., and can also effectively improve the brightness of the fluorescent light. The layer 111 is disposed inside the light cavity 11 and outside the light source 20, which can ensure that all the light emitted by the light source 20 passes through the fluorescent layer 111, and can effectively save fluorescent glue material.

In this embodiment, a convex portion 121 is provided at the center of the reflective surface 12, and the convex portion 121 functions as a convex lens, which can effectively improve the center brightness and avoid the formation of dark spots in the center of the light spot.

In this embodiment, the reflective surface 12 is covered with a frosted layer 122, and the frosted layer 122 can effectively improve the uniform light effect, so that the brightness of the formed light spot is uniform.

In this embodiment, a base 30 is fixed on the bottom of the lens body 10, the light-setting cavity 11 penetrates through the base 30 at the same time, and the base 30 is covered with a reflective layer 31. Preferably, the reflective layer 31 is a high-gloss aluminum layer or a metallic silver layer. The reflective layer 31 can effectively prevent light from leaking from the bottom of the lens body 10, and can effectively improve the utilization rate of energy.

Based on the above embodiment, at least three positioning feet 32 are fixed at the bottom of the base 30 , and the positioning feet 32 can effectively improve the installation and positioning effect of the lens.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that for those of ordinary skill in the art, some modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for this utility model shall be subject to the appended claims.

Claims (6)

1. A lens for a TV backlight module, comprising a lens body (10) and a light source (20), the bottom of the lens body (10) is provided with a light cavity (11), the light source (20) ) is located in the light-setting cavity (11), the top of the lens body (10) is provided with a reflective surface (12) with a downwardly recessed center, and it is characterized in that the side surface of the lens body (10) is surrounded by a reflective surface (12). An annular first light emitting part (13) and an annular second light emitting part (14), the first light emitting part (13) is located above the second light emitting part (14), the second light emitting part (14) ) includes a plurality of scattering microstructures (141) that are closely connected, and the scattering microstructures (141) are inwardly concave structures with arc surfaces. 2 . The lens for a TV backlight module according to claim 1 , wherein a fluorescent layer ( 111 ) is filled between the light housing cavity ( 11 ) and the light source ( 20 ). 3 . . 3 . The lens for a TV backlight module according to claim 1 , wherein a convex portion ( 121 ) is provided at the center of the reflective surface ( 12 ). 4 . 4. The lens for a TV backlight module according to claim 1 or 3, wherein the reflective surface (12) is covered with a frosted layer (122). 5. A lens for a TV backlight module according to claim 1, wherein a base (30) is fixed on the bottom of the lens body (10), and the base (30) is covered with Reflective layer (31). 6 . The lens for a TV backlight module according to claim 5 , wherein positioning feet ( 32 ) are fixed on the bottom of the base ( 30 ). 7 .

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