CN215910760U

CN215910760U - Back light source

Info

Publication number: CN215910760U
Application number: CN202121667843.9U
Authority: CN
Inventors: 徐贤强; 卜卫勇; 姜发明; 潘连兴
Original assignee: Shenzhen Australis Electronic Technology Co Ltd
Current assignee: Shenzhen Australis Electronic Technology Co Ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2022-02-25
Anticipated expiration: 2031-07-21

Abstract

The utility model provides a backlight, comprising: the iron frame surrounds a mounting space along the circumferential direction of the iron frame; at least one edge of the iron frame is provided with a limiting groove; the light guide plate is positioned in the accommodating space and comprises a plate body and a clamping part; the plate body is positioned in the accommodating space and extends towards the limiting groove to form the clamping part; the clamping part is clamped with the limiting groove, and the clamping part faces the side face of the limiting groove and is provided with a clamping groove. Compared with the prior art, at least one edge of chase is equipped with the spacing groove, and the plate body of light guide plate court extends towards the spacing groove and forms the card portion of holding, and the card portion of holding of light guide plate and the spacing groove joint of chase are in order to realize fixed light guide plate, and to prior art, can install the light guide plate fast in the chase, in order to realize the fast assembly of backlight.

Description

Back light source

Technical Field

The utility model relates to the field of displays, in particular to a backlight source.

Background

The backlight source is a light source located at the back of the liquid crystal display, and the light emitting effect of the backlight source directly influences the visual effect of the liquid crystal display module. The liquid crystal display does not emit light itself, and it displays a pattern or its result of modulating light.

Among the prior art, glue frame and light guide plate structure's being shaded and all can glue the frame inside to the membrane material location basically, lead to the packaging efficiency of backlight low, and be unfavorable for repairing the dismantlement.

Therefore, the prior art has defects and needs to be improved and developed.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a backlight, which is intended to solve the problem of low assembly efficiency of the prior art backlight.

The technical scheme adopted by the utility model for solving the technical problem is as follows: a backlight, comprising: the iron frame surrounds a mounting space along the circumferential direction of the iron frame; at least one edge of the iron frame is provided with a limiting groove; the light guide plate is positioned in the accommodating space and comprises a plate body and a clamping part; the plate body is positioned in the accommodating space and extends towards the limiting groove to form the clamping part; the clamping part is clamped with the limiting groove, and the clamping part faces the side face of the limiting groove and is provided with a clamping groove.

Further, the distance between the clamping groove and the plate body is gradually increased along the direction of increasing the thickness of the clamping part.

Furthermore, the clamping groove is step-shaped.

Furthermore, the depth of the limiting groove is the same as the thickness of the light guide plate.

Furthermore, at least one of the corners of the iron frame is provided with a force unloading groove, the force unloading grooves are distributed along the vertical direction, and the top of each force unloading groove is provided with an opening.

Further, the light guide plate further comprises an extension portion, the extension portion is formed by extending the plate body outwards, and the extension portion is abutted to the force unloading groove.

Furthermore, the number of the extending parts is two, and the two extending parts are distributed at the corners corresponding to the edges where the width direction of the plate body is located.

Further, the backlight source further includes: the reflecting sheet is arranged below the light guide plate; the diffusion sheet is arranged above the light guide plate; the lower brightening is flaky and is arranged above the diffusion sheet; the upper intensifying is flaky and arranged above the lower intensifying; a reflective polarizer disposed above the upper intensifying layer.

Further, the upper intensifying light outwards exceeds the reflection type polarizer along the width direction of the upper intensifying light; the lower intensifying outwards exceeds the upper intensifying along the width direction of the lower intensifying; the diffusion sheet outwards exceeds the lower intensifying plate along the width direction of the diffusion sheet.

Further, the backlight source further comprises a light source, and the light source is arranged on the inner side of the iron frame.

Compared with the prior art, at least one edge of chase is equipped with the spacing groove, and the plate body of light guide plate court extends towards the spacing groove and forms the card portion of holding, and the card portion of holding of light guide plate and the spacing groove joint of chase are in order to realize fixed light guide plate, and to prior art, can install the light guide plate fast in the chase, in order to realize the fast assembly of backlight.

Meanwhile, the extending part is provided with a clamping groove, so that the light guide plate can be conveniently and rapidly pried through the clamping groove when the backlight source is repaired, and rapid disassembly when the backlight source is repaired is realized.

Drawings

Fig. 1 is a schematic structural diagram of a backlight according to an embodiment of the utility model.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic structural diagram of a backlight source in the length direction according to an embodiment of the utility model.

Fig. 4 is a schematic structural diagram of a backlight source in the width direction according to an embodiment of the utility model.

Fig. 5 is an enlarged schematic view of a portion B in fig. 4.

Fig. 6 is a bottom view of a backlight according to an embodiment of the utility model.

Fig. 7 is an enlarged schematic view of a portion C in fig. 6.

Description of reference numerals:

100. a backlight source; 10. an iron frame; 101. a limiting groove; 102. a force unloading groove; 20. a light guide plate; 201. a plate body; 202. a chucking section; 2021. a card slot; 203. an extension portion; 30. a reflective sheet; 40. a diffusion sheet; 50. lower brightening; 60. upward brightening; 70. a reflective polarizer; 80. and (5) gluing the frame.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present 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 otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention provides a backlight 100. the backlight 100 can be used to assemble a display.

Referring to fig. 1 to 7, a backlight 100 includes an iron frame 10, a light guide plate 20, a light source (not shown), a reflective sheet 30, a diffusion sheet 40, a lower intensifying layer 50, an upper intensifying layer 60, a reflective polarizer 70, and a rubber frame 80.

Referring to fig. 1 to 4, the iron frame 10 is shaped like a rectangular box, and has a closed bottom surface and an open top surface. The peripheral direction of the iron frame 10 is enclosed to form a placing space. At least one edge of the iron frame 10 is provided with a limiting groove 101, so that the edge where the limiting groove 101 is located has a notch.

In this embodiment, there is one limiting groove 101, and the limiting groove is located on the edge of the iron frame 10 in the width direction.

In other embodiments, a plurality of the limiting grooves 101 may be provided, and a plurality of the limiting grooves 101 may be provided on one or more sides of the iron frame 10. Specifically, when a plurality of stopper grooves 101 are provided on one side of the iron frame 10, the plurality of iron frames 10 are provided at intervals. When the plurality of limiting grooves 101 are disposed on a plurality of sides of the iron frame 10, the plurality of limiting grooves 101 may be disposed on each side of the iron frame 10, and the specific disposition position thereof may be flexibly disposed according to actual conditions, which will not be described in detail herein.

At least one of the corners of the iron frame 10 is provided with a force-releasing slot 102. The force-discharging slot 102 extends in the vertical direction, and the top of the force-discharging slot is opened, so that two edges where the force-discharging slot 102 is located form a gap at the joint.

In the present embodiment, four force-discharging slots 102 are provided, and four force-discharging slots 102 are distributed at four corners of the chase 10.

In other embodiments, one or two or three force-discharging slots 102 can be provided, wherein the distribution position of the force-discharging slots 102 can be flexibly selected according to actual conditions.

The light guide plate 20 is in a block shape. The light guide plate 20 is an optical acrylic plate, and has light guide points on its bottom surface. The light guide plate 20 may diffuse light emitted from the light source to various angles, so that it emits light uniformly. The light emitting principle of the light guide plate 20 can be referred to the related art, and will not be described in detail herein.

The light guide plate 20 includes a plate body 201, a catch 202, and an extension portion 203.

Referring to fig. 1 to 7, the plate 201 is in a rectangular block shape. The size of the plate body 201 is matched with the size of the bottom surface of the iron frame 10.

The catch 202 is formed by extending the plate body 201 toward the retaining groove 101. The shape of the holding part 202 is matched with that of the limiting groove 101. The thickness of the clamping portion 202 is adapted to the depth of the limiting groove 101, and the clamping portion 202 is clamped in the limiting groove 101, so that the light guide plate 20 is detachably mounted in the iron frame 10. Specifically, the size of the clamping portion 202 is slightly larger than the size of the limiting groove 101, so that when the light guide plate is installed, the clamping portion 202 and the edge of the iron frame 10 where the limiting groove 101 is located generate friction force to realize that the clamping portion 202 is clamped in the limiting groove 101, and further the detachable connection of the light guide plate 20 and the iron frame 10 is realized.

The clamping portion 202 is provided with a clamping groove 2021, which is convenient for prying the light guide plate 20 when the backlight source 100 is repaired and disassembled, so as to separate the light guide plate 20 from the bezel 10. Specifically, when detaching, a screwdriver or other tools are used to extend into the slot 2021, and the bezel 10 is used as a fulcrum, so that the light guide plate 20 can be detached from the bezel 10.

The distance between the clamping groove 2021 and the plate body 201 gradually increases along the direction of increasing thickness of the clamping portion 202. In other embodiments, the engaging groove 2021 is stepped, and the engaging groove 2021 gradually increases along the direction of increasing thickness of the engaging portion 202, so that a screwdriver or other tools can be more easily abutted against the engaging groove 2021 when the backlight panel is detached.

In other embodiments, the distance between the locking groove 2021 and the plate 201 gradually increases along the direction of increasing thickness of the locking portion 202, but the locking groove 2021 is in a slope shape.

The extension part 203 is located on the circumferential direction of the plate body 201 and distributed corresponding to the force unloading groove 102. The extension portion 203 is formed by extending the plate body 201 outward. The extension 203 abuts against the force-releasing slot 102, so that the iron frame 10 is firmly mounted in the force-releasing slot 102. Meanwhile, because the extending part 203 abuts against the iron frame 10, when the extending part 203 abuts against the iron frame 10, the iron frame 10 where the force unloading groove 102 is located inclines outwards, so that the extrusion force generated by the extrusion of the extending part 203 on the iron frame 10 can be reduced, and the iron frame 10 can be prevented from being deformed and damaged due to overlarge stress.

In this embodiment, two extending portions 203 are provided, and the two extending portions 203 are located at the corners corresponding to the edges where the width directions of the plate bodies 201 of the two extending portions 203 are located, so that a plurality of edges of the iron frame 10 can be deformed to a certain extent after being extruded by the light guide plate 20, and deformation and damage of the iron frame 10 are further reduced.

In other embodiments, one or more than two extensions 203 may be provided, and a plurality of extensions 203 may be provided at intervals in the circumferential direction of the plate body 201.

The light source is used to generate light so that the light guide plate 20 uniformly shines. The light source is disposed inside the bezel 10 and between the two extensions 203. The specific structure and the light emitting principle of the light source can be referred to the related art, and are not described in detail herein.

The reflective sheet 30 is in the form of a sheet, and is positioned under the light guide plate 20. Part of the light leaking from the side and bottom surfaces of the light guide plate 20 is reflected into the light guide plate 20 by the reflection sheet 30.

The diffusion sheet 40 is in a sheet shape and is positioned above the light guide plate 20. The diffusion sheet 40 has a certain diffusion function to the light source to enhance the display effect.

The lower intensifying layer 50 is in the form of a sheet, and is located above the diffusing sheet 40. The lower intensifying screen 50 concentrates the light emitted from the light source toward the front of the backlight 100, thereby improving the front luminance.

The upper intensifying 50 is in the form of a sheet and is located above the lower intensifying 60. The up-enhancement light 60 concentrates light emitted from the light source toward the front of the backlight 100, thereby improving the front luminance.

The reflective polarizer 70 is in the form of a sheet, which is positioned above the upper intensifying layer 60. The main function of the reflective polarizer 70 is to convert natural light without polarization into polarized light, and the operation principle thereof is described in detail with reference to the related art.

The upper intensifying 60 is beyond the reflection type polarizer 70 along the width direction of the upper intensifying 60, the lower intensifying 50 is beyond the upper intensifying 60 along the width direction of the lower intensifying 50, and the diffusion sheet 40 is beyond the lower intensifying 50 along the width direction of the lower intensifying 50, so that the edges of the diffusion sheet 40, the lower intensifying 50, the upper intensifying 60 and the reflection type polarizer 70 in the width direction are step-shaped, and along the height increasing direction, the width of the diffusion sheet is gradually reduced, the display area of the edge of the backlight source 100 in the width direction is slightly reduced, and the light leakage of the edge of the backlight source 100 in the width direction can be prevented.

The rubber frame 80 is shaped like a frame, and is disposed around the light guide plate 20 to limit the light guide plate 20, the reflective sheet 30, the diffusion sheet 40, the lower intensifying 50, the upper intensifying 60, and the reflective polarizer 70 along the circumferential direction.

In some embodiments, to further secure the light guide plate 20, glue is used to help secure the light guide plate 20 to prevent the light guide plate 20 from loosening.

In summary, compared with the prior art, in the backlight source 100 provided by the present invention, the limiting groove 101 is disposed on at least one edge of the bezel 10, the plate body 201 facing the light guide plate 20 extends toward the limiting groove 101 to form the retaining portion 202, and the retaining portion 202 of the light guide plate 20 is clamped with the limiting groove 101 of the bezel 10 to fix the light guide plate 20.

Meanwhile, since the extending portion 203 is provided with the engaging groove 2021, the light guide plate 20 can be easily pried by the engaging groove 2021 when the backlight source 100 is repaired, so as to achieve the quick detachment when the backlight source 100 is repaired.

It is to be understood that the utility model is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the utility model as defined by the appended claims.

Claims

1. A backlight, comprising:

the iron frame surrounds a mounting space along the circumferential direction of the iron frame; at least one edge of the iron frame is provided with a limiting groove;

the light guide plate is positioned in the accommodating space and comprises a plate body and a clamping part; the plate body is positioned in the accommodating space and extends towards the limiting groove to form the clamping part; the clamping part is clamped with the limiting groove, and the clamping part faces the side face of the limiting groove and is provided with a clamping groove.

2. The backlight of claim 1, wherein a distance between the clamping groove and the plate body gradually increases along a direction in which a thickness of the clamping portion increases.

3. The backlight of claim 2, wherein the slot is stepped.

4. The backlight of claim 1, wherein the depth of the limiting groove is the same as the thickness of the light guide plate.

5. The backlight source of claim 1, wherein at least one of the corners of the bezel has a force-releasing slot, the force-releasing slots are distributed along a vertical direction, and the top of the force-releasing slot has an opening.

6. The backlight of claim 5, wherein the light guide plate further comprises an extension portion formed by the plate body extending outward, and the extension portion abuts against the force-releasing groove.

7. The backlight source as claimed in claim 6, wherein there are two of the extending portions, and the two extending portions are distributed at the corners corresponding to the sides of the board body in the width direction.

8. The backlight of claim 1, further comprising:

the reflecting sheet is arranged below the light guide plate;

the diffusion sheet is arranged above the light guide plate;

the lower brightening is flaky and is arranged above the diffusion sheet;

the upper intensifying is flaky and arranged above the lower intensifying;

a reflective polarizer disposed above the upper intensifying layer.

9. The backlight of claim 8, wherein the add-on light extends outward beyond the reflective polarizer in a width direction of the add-on light;

the lower intensifying outwards exceeds the upper intensifying along the width direction of the lower intensifying;

the diffusion sheet outwards exceeds the lower intensifying plate along the width direction of the diffusion sheet.

10. The backlight of any of claims 1-9, further comprising a light source disposed inside the bezel.