阅读说明：本技术 背光结构、背光模组以及液晶显示装置及其组装方法 (Backlight structure, backlight module, liquid crystal display device and assembling method thereof ) 是由 黄阿宝 辛武根 康报虹 于 2021-08-31 设计创作，主要内容包括：本申请公开了一种背光结构、背光模组以及液晶显示装置及其组装方法,背光结构包括背板和胶框,背板包括底板、侧板和顶板,侧板垂直连接于底板,顶板连接于侧板并与底板平行,底板、侧板和顶板之间形成凹槽,胶框一体成型于凹槽；胶框包括竖直部和水平部,竖直部与水平部垂直设置,竖直部位于凹槽内并与侧板平行,水平部自竖直部向竖直部远离侧板的一侧延伸,水平部与底板之间形成用于安装光学组件的容纳腔,胶框上设有用于定位光学组件的第一定位部；本申请通过将背板和胶框采用一体结构设置,简化组装步骤,同时降低人工成本。(The application discloses a backlight structure, a backlight module, a liquid crystal display device and an assembling method of the liquid crystal display device, wherein the backlight structure comprises a back plate and a rubber frame, the back plate comprises a bottom plate, a side plate and a top plate, the side plate is vertically connected to the bottom plate, the top plate is connected to the side plate and is parallel to the bottom plate, a groove is formed among the bottom plate, the side plate and the top plate, and the rubber frame is integrally formed in the groove; the glue frame comprises a vertical part and a horizontal part, the vertical part and the horizontal part are vertically arranged, the vertical part is positioned in the groove and is parallel to the side plate, the horizontal part extends from the vertical part to one side of the vertical part far away from the side plate, an accommodating cavity for mounting the optical assembly is formed between the horizontal part and the bottom plate, and a first positioning part for positioning the optical assembly is arranged on the glue frame; this application is through adopting integrative structure setting with backplate and gluey frame, simplifies the equipment step, reduces the cost of labor simultaneously.)

1. A backlight structure comprises a back plate and a rubber frame, and is characterized in that the back plate comprises a bottom plate, side plates and a top plate, the side plates are vertically connected to the bottom plate, the top plate is connected to the side plates and is parallel to the bottom plate, grooves are formed among the bottom plate, the side plates and the top plate, and the rubber frame is integrally formed in the grooves; the glue frame comprises a vertical portion and a horizontal portion, the vertical portion is perpendicular to the horizontal portion, the vertical portion is located in the groove and parallel to the side plate, the horizontal portion extends from the vertical portion to one side, away from the side plate, of the vertical portion, an accommodating cavity for mounting an optical assembly is formed between the horizontal portion and the bottom plate, and a first positioning portion for positioning the optical assembly is arranged on the glue frame.

2. The backlight structure of claim 1, wherein the back plate and the bezel are integrally injection molded.

3. The backlight structure of claim 1, wherein the first positioning portion is a first positioning protrusion or a first positioning groove formed on the vertical portion.

4. A backlight module comprising the optical assembly and the backlight structure of any one of claims 1 to 3, wherein the optical assembly is disposed in the accommodating cavity, the optical assembly is provided with a second positioning portion, and one of the first positioning portion and the second positioning portion is embedded in the other.

5. The backlight module according to claim 4, wherein the optical assembly comprises a light guide plate and an optical film, the light guide plate is disposed between the bottom plate and the optical film, the first positioning portion is a second positioning groove disposed on the horizontal portion and opposite to the bottom plate, the second positioning portion is a second positioning protrusion disposed on the light guide plate, and the second positioning protrusion defines a position of the optical film on the light guide plate and extends into the second positioning groove.

6. The backlight module according to claim 5, wherein the optical film comprises a first end portion and a second end portion opposite to each other, the first end portion and the second end portion are respectively provided with at least one avoiding portion, the number of the second positioning protrusions is at least two and corresponds to the avoiding portions one by one, and the second positioning protrusions extend upward from the upper surface of the light guide plate and pass through the avoiding portions.

7. The backlight module according to claim 6, wherein the relief portion is a notch formed at an edge of the first end portion and the second end portion.

8. The backlight module as claimed in claim 5, wherein the adhesive frame comprises a first frame member, a second frame member and a third frame member connected in sequence, the second frame member is perpendicular to the first frame member and the third frame member, the first frame member and the third frame member are disposed opposite to each other, the first frame member and the third frame member are respectively provided with the horizontal portions, and the horizontal portions extend along the length direction of the first frame member and the third frame member; along the length direction of the first frame piece and the third frame piece, the second positioning groove at least comprises an opening end, and the opening end is positioned at one end, far away from the second frame piece, of the second positioning groove.

9. A liquid crystal display device comprising the backlight module of any one of claims 4 to 8, and a display panel adhesively fixed on the upper surface of the horizontal portion of the adhesive frame.

10. An assembling method of a liquid crystal display device for assembling the display device according to claim 9, comprising the steps of:

positioning the optical film on the light guide plate;

aligning the second positioning protrusion and the second positioning groove;

pushing the optical assembly into the rubber frame from the side opposite to the second frame piece, so that the second positioning protrusion enters the second positioning groove;

and adhering the display panel to the horizontal part of the rubber frame.

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a backlight structure, a backlight module, a liquid crystal display device and an assembling method thereof.

Background

A Liquid Crystal Display (LCD) has many advantages such as a thin body, power saving, and no radiation, and is widely used. Most of the existing liquid crystal display devices in the market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module (backlight module). The liquid crystal display panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, and the liquid crystal molecules are controlled to change directions by electrifying the glass substrates or not, so that light rays of the backlight module are refracted out to generate pictures. A conventional liquid crystal display device generally includes: the liquid crystal display panel comprises a rear shell, a front shell matched with the rear shell, a backlight module arranged in the rear shell, a rubber frame arranged on the backlight module and a liquid crystal display panel arranged on the rubber frame, wherein the rubber frame is used for bearing the liquid crystal display panel, and the front shell is used for fixing the liquid crystal display panel.

Currently, liquid crystal display devices are widely used in various electronic products as display components of electronic devices, and with the development of light and thin electronic products, the requirements of the display devices of the electronic devices are increasing. Because the backlight structure of the traditional display device is formed by assembling and then fixing two separated components, namely a back plate and a rubber frame, the assembly consumes manpower and material resources, and meanwhile, the time for assembling the components subsequently is prolonged; meanwhile, in order to realize a narrow frame, a front shell is not used for fixing the liquid crystal display panel, so that the assembling steps of the whole display device are changed, how to ensure that the optical assembly can be fixed after being assembled is realized, and the problem that horizontal shaking is not generated to be solved is solved.

Disclosure of Invention

The present application provides a backlight structure, a backlight module, a liquid crystal display device and an assembling method thereof, which can simplify the assembling steps of the display device and ensure that an optical assembly can be fixed after being assembled without horizontal shaking.

The application discloses a backlight structure, which comprises a back plate and a rubber frame, wherein the back plate comprises a bottom plate, a side plate and a top plate, the side plate is vertically connected to the bottom plate, the top plate is connected to the side plate and is parallel to the bottom plate, a groove is formed among the bottom plate, the side plate and the top plate, and the rubber frame is integrally formed in the groove; the glue frame comprises a vertical portion and a horizontal portion, the vertical portion is perpendicular to the horizontal portion, the vertical portion is located in the groove and parallel to the side plate, the horizontal portion extends from the vertical portion to one side, away from the side plate, of the vertical portion, an accommodating cavity for mounting an optical assembly is formed between the horizontal portion and the bottom plate, and a first positioning portion for positioning the optical assembly is arranged on the glue frame.

Optionally, the back plate and the rubber frame are integrally formed by injection molding.

Optionally, the first positioning portion is a first positioning protrusion or a first positioning groove formed on the vertical portion.

The application also discloses a backlight module, including optical assembly with the structure of being shaded, optical assembly establishes hold the intracavity, optical assembly is equipped with second location portion, first location portion with one of second location portion imbeds in the other one.

Optionally, the optical assembly includes a light guide plate and an optical film, which are overlapped, the light guide plate is located between the bottom plate and the optical film, the first positioning portion is a second positioning groove that is disposed on the horizontal portion and is opposite to the bottom plate, the second positioning portion is a second positioning protrusion that is disposed on the light guide plate, and the second positioning protrusion defines a position of the optical film on the light guide plate and extends into the second positioning groove.

Optionally, the optical film includes a first end portion and a second end portion which are opposite to each other, the first end portion and the second end portion are respectively provided with at least one avoidance portion, the number of the second positioning protrusions is at least two, and the second positioning protrusions are in one-to-one correspondence with the avoidance portions, and extend upwards from the upper surface of the light guide plate and penetrate through the avoidance portions.

Optionally, the relief portion is a notch formed in an edge of the first end portion and the second end portion.

Optionally, the rubber frame includes a first frame, a second frame and a third frame, which are connected in sequence, the second frame is perpendicular to the first frame and the third frame, the first frame and the third frame are arranged oppositely, the first frame and the third frame are respectively provided with the horizontal portion, and the horizontal portion extends along the length direction of the first frame and the length direction of the third frame; along the length direction of the first frame piece and the third frame piece, the second positioning groove at least comprises an opening end, and the opening end is positioned at one end, far away from the second frame piece, of the second positioning groove.

The application also discloses a liquid crystal display device, include backlight unit to and display panel, display panel bonding is fixed the upper surface of the horizontal part of gluey frame.

The application also discloses an assembling method of the liquid crystal display device, which comprises the following steps:

positioning the optical film on the light guide plate;

aligning the second positioning protrusion and the second positioning groove;

pushing the optical assembly into the rubber frame from the side opposite to the second frame piece, so that the second positioning protrusion enters the second positioning groove;

and adhering the display panel to the horizontal part of the rubber frame.

This application is through forming a recess on the backplate, will glue frame an organic whole and be formed into on the recess, because in the assembly process of traditional structure in a poor light, backplate and gluey frame are the separate equipment, structure in a poor light still need fix it through other mountings after the equipment like this, the assembly cycle length from this, the cost of labor also corresponding improvement, and backplate and gluey frame an organic whole set up, can simplify the assembly process, the short equipment time reduces the cost of labor simultaneously. The integrated structure can reduce the overall thickness of the rubber frame and the back plate, and can be applied to narrow-frame and frameless liquid crystal display devices; the chamber that holds that forms an optical assembly between gluey frame and the backplate in addition, optical assembly can fix a position through the first locating part on gluing the frame after whole adoption mode installation of pushing like this, prevents that optical assembly from holding intracavity level and rocking.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic diagram of the overall structure of a first embodiment of the backlight structure of the present application;

FIG. 2 is an enlarged partial schematic view of region A of FIG. 1 of the present application;

fig. 3 is a schematic view of an overall structure of a backlight module according to a first embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of the backlight module of the first embodiment of the present application along the section line B-B' in FIG. 3;

FIG. 5 is a schematic diagram of the overall structure of an optical assembly according to a first embodiment of the present application;

FIG. 6 is an enlarged, fragmentary view of region C of FIG. 5 of the present application;

fig. 7 is a schematic view of the overall structure of a liquid crystal display device according to a first embodiment of the present application;

FIG. 8 is a schematic cross-sectional view taken along section line B-B' of the first embodiment of the present application shown in FIG. 7;

FIG. 9 is a schematic view of an assembly method of a liquid crystal display device according to a first embodiment of the present application;

FIG. 10 is a schematic cross-sectional view of a backlight module according to a second embodiment of the present application, taken along section line B-B' of FIG. 3;

FIG. 11 is a schematic cross-sectional view of another backlight module according to the second embodiment of the present application, taken along section line B-B' of FIG. 3;

fig. 12 is a schematic cross-sectional view of a backlight module according to a third embodiment of the present application along the section line B-B' in fig. 3.

100, a liquid crystal display device; 200. a backlight structure; 210. a back plate; 211. a base plate; 212. a side plate; 213. a top plate; 214. a groove; 220. a rubber frame; 221. a vertical portion; 222. a horizontal portion; 223. a first frame member; 224. a second frame member; 225. a third frame member; 300. an accommodating chamber; 400. a backlight module; 500. an optical component; 510. a light guide plate; 520. an optical film; 521. a first end portion; 522. a second end portion; 523. an avoidance part; 600. a first positioning portion; 610. a first positioning projection; 620. a first positioning groove; 630. a second positioning groove; 640. a fourth positioning projection; 700. a second positioning portion; 710. a second positioning projection; 720. a third positioning projection; 730. a third positioning groove; 740. a fourth positioning groove; 800. a display panel.

Detailed Description

It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.

Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The present application is described in detail below with reference to the figures and alternative embodiments.

The first embodiment is as follows:

fig. 1 is a schematic view illustrating an overall structure of a backlight structure 200 according to a first embodiment of the present application, and fig. 2 is a schematic view illustrating a partial enlargement of a region a in fig. 1, and as shown in fig. 1-2, a backlight structure 200 includes a back plate 210 and a glue frame 220, wherein the back plate 210 includes a bottom plate 211, a side plate 212 and a top plate 213, the side plate 212 is perpendicularly connected to the bottom plate 211, the top plate 213 is connected to the side plate 212 and is parallel to the bottom plate 211, a groove 214 is formed between the bottom plate 211, the side plate 212 and the top plate 213, and the glue frame 220 is integrally formed in the groove 214; the plastic frame 220 includes a vertical portion 221 and a horizontal portion 222, the vertical portion 221 and the horizontal portion 222 are disposed perpendicularly, the vertical portion 221 is located in the groove 214 and parallel to the side plate 212, the horizontal portion 222 extends from the vertical portion 221 to a side of the vertical portion 221 away from the side plate 212, a receiving cavity 300 for mounting the optical assembly 500 is formed between the horizontal portion 222 and the bottom plate 211, and a first positioning portion 500 for positioning the optical assembly 500 is disposed on the plastic frame 220.

In this embodiment, a groove 214 is formed on the back plate 210, and the rubber frame 220 is integrally formed on the groove 214, so that the back plate 210 and the rubber frame 220 are mutually embedded to form a stable integrated structure, because the optical assembly 500 slightly shakes after being assembled, when shaking occurs, stress is generated between the side edge of the optical assembly 500 and the rubber frame 220, the pressure of the optical assembly can be extruded towards the root of the rubber frame 220 according to inertia and then further extruded towards the groove 214, and thus, under the extrusion action of force, the embedded structure of the rubber frame 220 and the back plate 210 can be more stable; and backplate 210 and gluey frame 220 integrative the setting, can simplify the assembly process, shorten the equipment time, reduce the cost of labor simultaneously. The integrated structure can reduce the overall thickness of the rubber frame 220 and the back plate 210, and can be applied to the liquid crystal display device 100 with narrow frame and no frame; and a containing cavity 300 of the optical assembly 500 is formed between the rubber frame 220 and the back plate 210, so that the optical assembly 500 can be positioned by the first positioning part 500 on the rubber frame 220 after being installed in a whole push-in manner, and the optical assembly 500 is prevented from horizontally shaking in the containing cavity 300.

The back plate 210 and the rubber frame 220 are integrally formed by injection molding. Because the back plate 210 is generally made of a metal material, the back plate 210 made of the metal material can improve the bearing strength, the rubber frame 220 is made of a plastic material, the rubber frame 220 cannot scratch the optical assembly after being attached to and abutted against the optical assembly 500, and the back plate 210 and the rubber frame 220 are integrally formed by injection molding, so that the rubber frame 220 can be tightly engaged with the groove of the back plate 210, and the fixing strength of the whole backlight structure 200 is integrally improved.

Further, fig. 3 shows a schematic view of an overall structure of a backlight module 400 provided in a first embodiment of the present application, fig. 4 is an enlarged schematic view of a portion of a region C in fig. 3, as shown in fig. 5 to 6, a backlight module 400 includes the optical assembly 500 and the backlight structure 200, the optical assembly 500 is disposed in the accommodating cavity 300, the optical assembly is provided with a second positioning portion 600, and one of the first positioning portion 500 and the second positioning portion 600 is embedded in the other. Can carry on spacingly after holding chamber 300 to optical assembly installation like this, make optical assembly 500 difficult the phenomenon that the level rocked appearing holding chamber 300.

Specifically, fig. 5 shows a schematic view of an overall structure of an optical assembly 500 provided in a first embodiment of the present application, fig. 6 is a schematic view of a partially enlarged area D in fig. 5, as shown in fig. 5-6, the optical assembly 500 includes a light guide plate 410 and an optical film 420 that are overlapped, the light guide plate 410 is located between the bottom plate 211 and the optical film 420, the first positioning portion 500 is a second positioning groove 530 that is disposed on the horizontal portion 222 and is opposite to the bottom plate 211, the second positioning portion 600 is a second positioning protrusion 610 that is disposed on the light guide plate 410, and the second positioning protrusion 610 defines a position of the optical film 420 on the light guide plate 410 and extends into the second positioning groove 530. The optical film 420 includes a first end portion and a second end portion opposite to each other, the first end portion and the second end portion are respectively provided with at least one avoiding portion 423, the number of the second positioning protrusions 610 is at least two, and the second positioning protrusions 610 correspond to the avoiding portions 423 one to one, and extend upward from the upper surface of the light guide plate 410 and pass through the avoiding portions 423. Through the cooperation of the second positioning protrusion 610 and the avoiding portion 423 of the optical film 420, the optical film 420 is prevented from horizontally shifting after being mounted on the light guide plate 410, which affects the subsequent mounting of the whole backlight module 400, thereby increasing the manual assembly time, and even a large shift error may cause material fragments and material waste when the whole backlight module 400 is subsequently mounted; meanwhile, the second positioning protrusion 610 extends upward from the upper surface of the light guide plate 410, penetrates through the avoiding portion 423, and then is embedded in the second positioning groove 530 on the horizontal portion 222 of the plastic frame 220, so that the optical assembly 500 is prevented from horizontally swinging in the accommodating cavity 300, and a dual positioning effect is achieved; in addition, in this embodiment, the optical film 420 and the light guide plate 410 may be assembled in advance, so that it is possible to reduce the falling of foreign matters such as dust brought by human during manual assembly onto the light guide plate 410, thereby ensuring the display effect.

The rubber frame 220 comprises a first frame piece 223, a second frame piece 224 and a third frame piece 225 which are connected in sequence, the second frame piece 224 is respectively perpendicular to the first frame piece 223 and the third frame piece 225, the first frame piece 223 and the third frame piece 225 are arranged oppositely, the first frame piece 223 and the third frame piece 225 are respectively provided with the horizontal part 222, and the horizontal part 222 extends along the length direction of the first frame piece 223 and the third frame piece 225; along the length direction of the first frame member 223 and the third frame member 225, the second positioning groove 530 at least includes an open end, and the open end is located at one end of the second positioning groove 530 far away from the second frame member 224. The assembled optical assembly 500 is pushed in through the open end, so that the optical assembly 500 is installed in the accommodating cavity 300 for fixing.

Further, the relief portion 423 is a notch formed at an edge of the first end portion 421 and the second end portion 422. Therefore, when the optical film 420 and the light guide plate 410 are assembled correspondingly, the limiting parts are easier to be sleeved and aligned, and the time for attaching and assembling the optical film 420 and the light guide plate 410 is saved, of course, the avoiding part 423 can also be in a through hole shape or other shapes, the quantity of the avoiding part 423 and the second positioning protrusion 610 can be correspondingly set as required, and the optical film 420 can be positioned only by being matched with the second positioning protrusion 610 on the light guide plate 410.

Fig. 7 is a schematic overall view of a liquid crystal display device 100 according to a first embodiment of the present disclosure, and fig. 8 is a schematic partial enlarged view of the liquid crystal display device 100 according to the first embodiment of the present disclosure, and the liquid crystal display device 100 shown in fig. 7-6 includes a backlight module 400 and a display panel 800, and the display panel 800 is adhesively fixed on an upper surface of the horizontal portion 222 of the bezel 220. The display panel 800 is fixed on the glue frame 220 by the special adhesive glue, so that the display panel 800 does not need to be fixed by buckling through the front frame, and the number of assembled parts is reduced, so that the processing period of devices is relatively shortened, the cost is correspondingly reduced, the assembling process is simpler and more convenient, and the whole structure of the whole display device is compact after the device is assembled, so that the whole display device is lighter and thinner.

Fig. 9 is a schematic diagram illustrating an assembling method of the liquid crystal display device 100 according to the present application, and as shown in the drawing, the assembling method of the liquid crystal display device 100 includes the steps of:

s1: positioning the optical film 420 on the light guide plate 410;

s2: aligning the second positioning protrusion 610 and the second positioning groove 530;

s3: pushing the optical assembly 500 into the adhesive frame 220 from the side opposite to the second frame member 224, so that the second positioning protrusion 610 enters the second positioning groove 530;

s4: the display panel 800 is adhered to the horizontal portion 222 of the rubber frame 220.

Example two:

fig. 10 is a schematic cross-sectional view of a backlight module 400 provided in a second embodiment of the present application along a section line B-B 'of fig. 3, and fig. 11 is a schematic cross-sectional view of another backlight module provided in the second embodiment along a section line B-B' of fig. 3, as shown in fig. 10-11, unlike the first embodiment, the first positioning portion 500 is a first positioning protrusion 510 or a first positioning groove 520 formed on the vertical portion 221. Correspondingly, a third positioning groove 620 or a third positioning protrusion 540 is disposed on a side edge of the light guide plate 410 corresponding to the vertical portion 221, and after the optical assembly 500 is installed in the accommodating cavity 300, the first positioning protrusion 510 is engaged with the third positioning groove 620 or the third positioning protrusion 540 is engaged with the first positioning groove 520, so as to position and fix the optical assembly 500. Therefore, the limiting part is not required to be arranged on the upper surface of the light guide plate 410, and the avoiding part 423 is not required to be dug on the optical film 420, so that the light-emitting surface of the whole backlight module 400 is ensured to be flat, and the light-emitting effect of the backlight module 400 is good.

Certainly, the first frame member 223, the second frame member 224 and the third frame member 225 of the rubber frame 220 corresponding to the three sides of the light guide plate 410 may be respectively provided with a corresponding first positioning protrusion 510 or a corresponding first positioning groove 520, so that the optical assembly 500 may be clamped and limited in three directions in the accommodating cavity 300, thereby achieving better limiting and fixing, and making the optical assembly 500 more stably installed.

A limiting structure can be further arranged between the light guide plate 410 and the optical film 420, so that the limiting structure does not protrude out of the upper surface of the optical film 420, and thus, the optical film 420 and the light guide plate 410 are aligned and attached without deviation, and the subsequent assembly of the backlight module 400 into the accommodating cavity 300 is smoother.

Example three:

fig. 12 is a schematic cross-sectional view of a backlight module 400 provided in a third embodiment of the present disclosure along a cross-sectional line B-B' in fig. 3, and as shown in fig. 12, unlike the first and second embodiments, the first positioning portion 500 is a fourth positioning protrusion 550 disposed on the horizontal portion 222 and opposite to the bottom plate 211, the second positioning portion 600 is a fourth positioning groove 630 disposed on the light guide plate 410, a length of the fourth positioning groove 630 is the same as a length of a corresponding edge of the light guide plate 410, and the fourth positioning protrusion 550 is embedded in the fourth positioning groove 630 to position the optical assembly 500 in the accommodating cavity 300.

The operation of directly digging the fourth positioning groove 630 on the light guide plate 410, which has the same length as the light guide plate 410, is simple, the difficulty is reduced, the fourth positioning protrusion 550 is formed on the plastic frame 220, the fourth positioning protrusion 550 corresponding to the fourth positioning groove 630 can be formed on the plastic frame 220 when the plastic frame 220 is formed by injection molding, and both can save the manufacturing time, thereby saving the assembly time of the whole backlight module 400 and improving the production efficiency.

Of course, the present solution can also adopt the combination of more than two of the first to the second embodiments, so as to achieve a better and more stable assembling effect.

It should be noted that, the limitations of each step in the present disclosure are not considered to limit the order of the steps without affecting the implementation of the specific embodiments, and the steps written in the foregoing may be executed first, or executed later, or even executed simultaneously, and as long as the present disclosure can be implemented, all the steps should be considered as belonging to the protection scope of the present application.

It should be noted that the inventive concept of the present application can form many embodiments, but the present application has a limited space and cannot be listed one by one, so that, on the premise of no conflict, any combination between the above-described embodiments or technical features can form a new embodiment, and after the embodiments or technical features are combined, the original technical effect will be enhanced.

The technical solution of the present application can be widely applied to various display devices, such as TN (Twisted Nematic) display device, IPS (In-Plane Switching) display device, VA (Vertical Alignment) display device, and MVA (Multi-Domain Vertical Alignment) display device, and can be applied to the above solutions.

The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.