CN104197242B - Backlight module and display device - Google Patents

Abstract

The invention provides a backlight module and a display device. The backlight module includes: at least two layers of optical structures, at least two layers of optical structures are provided with outwardly extending positioning lugs; The plastic frame on the periphery of the optical structure, the plastic frame is formed with a positioning notch at a position corresponding to the positioning lug, and the positioning lug is inserted into the positioning notch; and is arranged in the positioning notch for fixing the positioning lug to the Locate the fixture inside the notch. In the backlight module of the present invention, by setting a positioning gap on the plastic frame, the positioning lugs on the optical structures such as the optical film and the diffusion plate are inserted and fixed into the positioning gap through the fixing piece, and this fixing method does not require positioning columns. It can also realize the fixing of the optical film material and the diffusion plate, and can reduce the width of the positioning lugs on the optical film material and the diffusion plate, thereby reducing the width of the frame of the backlight module and realizing the structural design of an ultra-narrow frame.

Description

Backlight module and display device

technical field

The invention relates to the field of display technology, in particular to a backlight module and a display device.

Background technique

The backlight module is one of the important devices in the liquid crystal display. The direct-type backlight module mainly includes light source, optical film material, diffusion plate, plastic frame, back plate and other components. The light is emitted from the light source in the backlight module. After being reflected by the reflective sheet on the back panel, it directly shoots into the diffuser plate on the screen, and then shoots into the screen through the diffuser plate.

In the traditional direct type backlight module, the fixing method of the optical film material and the diffusion plate is as follows:

A positioning column (Sheet Guide) is provided on the plastic frame or the back plate, and a positioning gap is opened on the edge of the diffusion plate corresponding to the position of the positioning column. The positioning column is located in the positioning gap to position the diffusion plate. At the same time, the optical film material Positioning lugs are provided at the edge, and positioning holes are set on the positioning lugs. The positioning column is inserted into the positioning hole to position the optical film material, and then stick adhesive tape on the positioning hole of the optical film material to fix the optical film material and diffuser plate.

This method of fixing the optical film and the diffusion plate adopts the adhesive tape method, and it is necessary to reserve enough space on the plastic frame or the back plate to set the positioning column, which will increase the width of the positioning lugs on the optical film and the diffusion plate. , thereby increasing the width of the frame of the backlight module, and the structural design of the ultra-narrow frame cannot be realized.

Contents of the invention

The object of the present invention is to provide a backlight module and a display device, the fixing method of the optical film material and the diffusion plate can realize the ultra-narrow frame structure of the backlight module.

The technical scheme provided by the present invention is as follows:

A backlight module, comprising:

There are at least two layers of optical structures, and the edges of the at least two layers of optical structures are provided with outwardly extending positioning lugs;

A plastic frame disposed on the periphery of the at least two-layer optical structure, the plastic frame is formed with a positioning notch at a position corresponding to the positioning lug, and the positioning lug is inserted into the positioning notch;

And, a fixing member arranged in the positioning notch for fixing the positioning lug in the positioning notch.

Further, the positioning notch includes: a bottom surface portion; and, two side wall portions located on opposite sides of the positioning lug;

The fixing member includes: a card frame part arranged in the positioning notch, at least two layers of optical structure positioning lugs are located between the card frame part and the bottom surface part of the positioning notch, and the card frame part At least one part can be clamped between the two side wall parts of the positioning notch, so as to press the positioning lug on the bottom surface part of the positioning notch.

Further, a locking groove is provided at a position corresponding to the bottom surface portion of the positioning notch;

The fixing member further includes: a hook portion, one end of the hook portion is connected to the frame portion, and the other end is engaged with the engaging groove.

Further, at least one side wall part of the two side wall parts of the positioning notch is also provided with a guide post;

The card frame part is provided with a guide slot at a position corresponding to the guide post, which can cooperate with the guide post.

Further, the bottom part of the positioning notch is also provided with an upwardly protruding positioning post, and the positioning lug is provided with a positioning opening that cooperates with the positioning post.

Further, a gap is formed between the two side wall parts of the positioning notch and the positioning lug;

The fixing part also includes: a clip part, one end of the clip part is connected to the frame part, and the other end is clipped between the positioning lug and the two side wall parts of the positioning notch to form a within the gap.

Further, the backlight module also includes:

The shielding layer arranged on the periphery of the plastic frame and at least covers the positioning notch.

Further, the at least two-layer optical structure includes: an optical film material and a diffusion plate.

A display device includes the above-mentioned backlight module.

The beneficial effects of the present invention are as follows:

In the backlight module of the present invention, by setting a positioning notch on the plastic frame, the positioning lugs on optical structures such as optical film materials and diffusion plates are inserted and fixed into the positioning notch through fixing parts. This fixing method is different from the traditional one. Compared with the fixing methods of positioning columns, positioning lugs and tape sticking, the optical film and the diffusion plate can be fixed without positioning columns, so that the width of the positioning lugs on the optical film and the diffusion plate can be reduced, thereby Reduce the width of the frame of the backlight module to realize the structural design of the ultra-narrow frame.

Description of drawings

Fig. 1 is a schematic diagram of the fixing method of the optical film material and the diffusion plate of the backlight module provided by the present invention on the Pad side of the display panel;

Fig. 2 is a schematic diagram of the local structure of A in Fig. 1;

Fig. 3 is a schematic diagram of the cooperation structure between the positioning gap of the plastic frame in Fig. 2 and the optical film material and the diffusion plate;

Fig. 4 is a schematic structural view of the fixture in Fig. 2;

5 is a schematic diagram of the fixing method of the optical film material and the diffusion plate of the backlight module provided by the present invention on the Pad side of the display panel;

Fig. 6 is a schematic diagram of the partial structure of B in Fig. 1;

Fig. 7 is a schematic diagram of the cooperation structure between the positioning gap of the plastic frame in Fig. 6 and the optical film material and the diffusion plate;

FIG. 8 is a schematic structural diagram of the fixing member in FIG. 6 .

detailed description

The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

Aiming at the technical problem that the backlight module in the prior art, especially the direct type backlight module, cannot realize the ultra-narrow frame due to the fixing method of the optical film material and the diffusion plate, the present invention provides a backlight module that can realize the ultra-narrow frame. Narrow bezels.

As shown in Figures 1 to 8, a backlight module provided by the present invention includes:

There are at least two layers of optical structures, and the edges of the at least two layers of optical structures are provided with outwardly extending positioning lugs 100;

The plastic frame 200 arranged on the periphery of the at least two-layer optical structure, the plastic frame 200 is formed with a positioning gap at a position corresponding to the positioning lug 100, and the positioning lug 100 is inserted into the positioning within the gap;

And a fixing member 300 disposed in the positioning notch for fixing the positioning lug 100 in the positioning notch.

In the backlight module of the present invention, by providing a positioning gap on the plastic frame 200, the outwardly extending positioning lugs 100 on at least two layers of optical structures (such as the optical film material 101 and the diffusion plate 102, etc.) can be directly inserted into and fixed on the backlight module. In the positioning gap, and use the fixing part 300 to fix. Compared with the traditional fixing method, this fixing method does not need to reserve a space to set the positioning column on the plastic frame 200. Therefore, the thickness of the plastic frame 200 and the width of the positioning lug 100 can be reduced, so that the frame width of the backlight module can be reduced, and the structural design of an ultra-narrow frame can be realized.

It should be noted that in the embodiments provided by the present invention, the backlight module is described as an example of a direct-type backlight module, wherein the at least two layers of optical structure may include an optical film material 101 and a diffuser plate 102, of course Other optical structures may also be included.

It should be understood that the backlight module of the present invention is not limited to a direct-lit backlight module, such as an edge-lit backlight module, wherein the at least two layers of optical structure may be an optical film and a light guide plate.

In an embodiment provided by the present invention, as shown in the figure, preferably, the positioning notch is a notch with an opening facing upwards, which includes: a bottom portion 2011 ; and, located on opposite sides of the positioning lug 100 The side wall portion of 2012;

The fixing member 300 includes: a card frame part 301 arranged in the positioning notch, and at least two layers of optical structure positioning lugs 100 are located between the card frame part 301 and the bottom surface part 2011 of the positioning notch, so At least a part of the clamping frame portion 301 can be clamped between the two side wall portions 2012 of the positioning notch, so as to press the positioning lug 100 on the bottom surface portion 2011 of the positioning notch.

By adopting the above solution, during assembly, the positioning lug 100 on the optical film material 101 and the diffuser plate 102 can be inserted into the positioning notch, and then the positioning lug 100 can be directly fixed by the frame part 301 of the fixing member 300. Pressing on the positioning notch realizes the fixing of the optical film material 101 and the diffusion plate 102, and the fixing method is simple and convenient.

In order to improve the fixing firmness of the optical film material 101 and the diffusion plate 102, in an embodiment provided by the present invention, as shown in Fig. 2 to Fig. 4 and Fig. 6 to Fig. The position corresponding to the bottom part 2011 of the notch is provided with a snap-in groove 204; the fixing member 300 also includes: a hook part 302, one end of the hook part 302 is connected to the frame part 301, and the other end is connected to the frame part 301. The clamping groove 204 is clamped and connected.

With the above solution, the positioning lug 100 is directly pressed on the positioning notch by using the frame part 301 of the fixing member 300, and the hook part 302 can be used to engage and connect with the engaging groove 204. That is to say, the frame part 301 cooperates with the hook part 302 to fix the positioning lug 100 in the positioning notch of the plastic frame 200, and this locking and fixing method is more firm and reliable. .

In addition, in an embodiment provided by the present invention, as shown in FIG. 2 to FIG. 4 , preferably, at least one side wall part 2012 of the two side wall parts 2012 of the positioning notch is also provided with a guide post 202; The card frame part 301 is provided with a guide slot 3011 that can cooperate with the guide post 202 at a position corresponding to the guide post 202 . Further preferably, the guide posts 202 are respectively arranged on the two side wall parts 2012 .

By adopting the above scheme, the precise alignment of the fixing part 300 can be realized through the cooperation of the guide column 202 on the positioning notch and the guide groove 3011 on the fixing part 300. While facilitating the assembly of the fixing part and ensuring the installation accuracy of the fixing part, it can also prevent all The position of the fixing member 300 is shifted.

It should be noted that, in practical applications, a guide groove 3011 may also be provided on the positioning notch, and a guide column 202 may be provided on the frame portion 301 of the fixing member 300 . Moreover, it should be understood that other forms of guiding structures with guiding and offset-preventing functions provided on the positioning notch of the plastic frame 200 and the fixing member 300 should also fall within the protection scope of the present invention, and will not be discussed here one by one. enumerate.

In addition, the width of the frames of different display panels can be different, and the width of the same display panel can also be different on different sides (such as the width of the Pad side where the display panel is provided with a flexible circuit board and the opposite side of the Pad that is not provided with a flexible circuit board. ), therefore, according to the demand for the frame of the display device, when the width of the frame can reach a predetermined value and can meet the space requirements for setting the positioning columns on the plastic frame 200 (such as the display panel is provided with the Pad side of the flexible circuit board), in order To further prevent the optical film material 101 and the diffusion plate 102 from shaking from side to side, preferably, as shown in Figures 2 to 4, the bottom surface part 2011 of the positioning gap can also be provided with an upwardly protruding positioning column 203, and the positioning protrusion The ear 100 is provided with a positioning opening 103 that is matched with the positioning post 203 , and the positioning post 203 is inserted into the positioning opening 103 .

Adopt above-mentioned scheme, when the width of frame can reach a predetermined value, and can satisfy the space requirement that positioning post 203 is arranged on plastic frame 200 (such as: display panel is provided with the Pad side of flexible circuit board), can also be in plastic frame 200 The bottom part 2011 of the positioning gap is provided with an upwardly protruding positioning post 203. At this time, the positioning lug 100 on the optical film material 101 and the diffuser plate 102 can be made to extend outward with a slightly larger width, and a positioning lug 100 is provided on the positioning lug 100. Port 103, use the positioning port 103 of the positioning lug 100 on the optical film material 101 and the diffuser plate 102 to cooperate with the positioning column 203 to further position and fix the optical film material 101 and the diffuser plate 102 to prevent the optical film material 101 from And the diffusion plate 102 shakes.

It should be noted that, in the above solution, as shown in FIG. 3 , the positioning opening 103 on the optical film 101 can generally be configured as a through hole structure, while the positioning opening 103 on the diffuser plate 102 can generally be configured as a notch structure. Of course, it can be understood that the specific structure of the positioning port 103 is not limited here.

In addition, when the width of the frame is less than a predetermined value and cannot meet the space requirements for setting the positioning column 203 on the plastic frame 200 (such as the opposite side of the pad where the flexible circuit board is set on the display panel), in order to further prevent the optical film material 101 and the diffuser plate 102 from Left and right shaking occurs, preferably, as shown in Figures 6 to 8, a gap is formed between the two side wall parts 2012 of the positioning notch and the positioning lug 100; the fixing member 300 also includes: a clip part 303, one end of the clip part 303 is connected to the frame part 301, and the other end is clipped in the gap formed between the positioning lug 100 and the two side wall parts 2012 of the positioning notch. .

Using the above scheme, when the width of the frame is less than a predetermined value and cannot meet the space requirements for setting the positioning column 203 on the plastic frame 200 (such as the opposite side of the Pad where the display panel is set on the flexible circuit board), the optical film material 101 and the diffuser plate 102 The positioning lug 100 needs to be made with a narrow outward extension width, and a gap is formed between the two side wall parts 2012 of the positioning notch, and then the clip part 303 on the fixing member 300 is used to clamp on the positioning lug 100 and the two side wall parts 2012 of the positioning notch to further position and fix the optical film material 101 and the diffuser plate 102 to prevent the optical film material 101 and the diffuser plate 102 from shaking.

In addition, in the backlight module provided by the present invention, preferably, the backlight module further includes: a shielding layer disposed on the periphery of the plastic frame 200 and covering at least the positioning notch. By arranging a shielding layer outside the positioning notch, light leakage and foreign objects can be prevented. Preferably, the shielding layer may be a white adhesive tape pasted on the periphery of the positioning notch of the plastic frame 200 .

A preferred embodiment of the backlight module provided by the present invention is illustrated as follows.

The display panel in the liquid crystal display device includes a Pad side with a flexible circuit board and a Pad opposite side without a flexible circuit board, wherein the Pad side of the display panel has a wider frame due to the existence of the flexible circuit board, which can meet the requirements for setting on the plastic frame 200. The space requirement of the positioning column 203 , while the frame on the opposite side of the display panel to the Pad is relatively narrow, which cannot meet the space requirement of the positioning column 203 on the plastic frame 200 .

Therefore, in this embodiment, preferably, different fixing methods can be used on the Pad side of the display panel and the opposite side of the display panel to realize the fixing of optical structures such as the optical film material 101 and the diffusion plate 102 .

FIG. 1 is a schematic diagram of the fixing method of the optical film material 101 and the diffusion plate 102 on the Pad side of the display panel; FIG. 4 is a schematic diagram of the fixing member 300 used on the Pad side of the display panel. FIG. 5 is a schematic diagram of the fixing method of the optical film material 101 and the diffusion plate 102 on the opposite side of the display panel; FIG. 8 is a schematic diagram of the fixing member 300 used on the opposite side of the display panel.

As shown in Figures 1 to 8, the backlight module provided in this embodiment includes:

The optical film material 101 and the diffuser plate 102 are provided with outwardly extending positioning lugs 100 at the edge positions of the optical film material 101 and the diffuser plate 102;

The plastic frame 200 arranged on the periphery of the optical film material 101 and the diffusion plate 102, the plastic frame 200 is formed with a positioning notch at a position corresponding to the positioning lug 100, and the positioning lug 100 is inserted into the positioning notch, The positioning notch is a notch with an opening facing upwards, which includes: a bottom portion 2011 ; and two side wall portions 2012 located on opposite sides of the positioning lug 100 ;

And a fixing part 300 disposed in the positioning notch for fixing the positioning lug 100 in the positioning notch, the fixing part 300 includes:

The card frame part 301 arranged in the positioning notch, the positioning lug 100 of the optical film material 101 and the diffusion plate 102 is located between the card frame part 301 and the bottom surface part 2011 of the positioning notch, the card frame part At least a part of 301 can be clamped between the two side wall parts 2012 of the positioning notch, so as to press the positioning lug 100 on the bottom surface part 2011 of the positioning notch;

and a hook portion 302, one end of the hook portion 302 is connected to the frame portion 301, and the other end is engaged with the engaging groove 204;

Among them, on the Pad side of the display panel,

The bottom part 2011 of the positioning notch can also be provided with an upwardly protruding positioning column 203, and the positioning lug 100 is provided with a positioning opening 103 that matches the positioning column 203, and the positioning column 203 is inserted into the Inside the positioning port 103;

On the opposite side of the Pad of the display panel,

A gap is formed between the two side wall parts 2012 of the positioning notch and the positioning lug 100; the fixing member 300 further includes: a clip part 303, one end of the clip part 303 is connected to the clip frame On the part 301 , the other end is snapped into the gap formed between the positioning lug 100 and the two side wall parts 2012 of the positioning notch.

In the backlight module provided in this embodiment, on the Pad side and the opposite side of the display panel, two fixing methods are used to fix the optical film material 101 and the diffuser plate 102 according to the different frame widths, which can meet the requirements of the display panel. The frame width of the panel is required, and the fixing firmness is guaranteed.

It should be noted that, in other embodiments of the present invention, according to the frame requirements of the display panel, the same fixing method can also be used on the Pad side and the opposite side of the display panel to realize the fixing of the optical film 101 and the diffusion plate 102 For example, the first fixing method shown in Figure 2 to Figure 4 is adopted on the Pad side and the opposite side of the display panel to realize the fixing of the optical film material 101 and the diffusion plate 102, or, on the Pad side and the opposite side of the display panel Both sides of the pad adopt the second fixing method as shown in FIGS. 6 to 8 to realize the fixing of the optical film material 101 and the diffusion plate 102 .

In addition, another object of the present invention is to provide a display device comprising the above-mentioned backlight module.

The above description is a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (6)

1. A backlight module, characterized in that, comprising: There are at least two layers of optical structures, and the edges of the at least two layers of optical structures are provided with outwardly extending positioning lugs; A plastic frame disposed on the periphery of the at least two-layer optical structure, the plastic frame is formed with a positioning notch at a position corresponding to the positioning lug, and the positioning lug is inserted into the positioning notch; And, a fixing member arranged in the positioning notch for fixing the positioning lug in the positioning notch; The positioning notch includes: a bottom surface portion; and, two side wall portions located on opposite sides of the positioning lug; The fixing member includes: a card frame part arranged in the positioning notch, at least two layers of optical structure positioning lugs are located between the card frame part and the bottom surface part of the positioning notch, and the card frame part At least one part can be clamped between the two side wall parts of the positioning notch, so as to press the positioning lug on the bottom surface part of the positioning notch; Wherein, on the side where the width of the frame of the display panel is smaller than a predetermined value, A gap is formed between the two side wall parts of the positioning notch and the positioning lug; The fixing part also includes: a clip part, one end of the clip part is connected to the frame part, and the other end is clipped between the positioning lug and the two side wall parts of the positioning gap to form a within the gap. 2. The backlight module according to claim 1, characterized in that, A locking groove is provided on the bottom surface of the positioning notch; The fixing member further includes: a hook portion, one end of the hook portion is connected to the frame portion, and the other end is engaged with the engaging groove. 3. The backlight module according to claim 1, characterized in that, On the other side where the width of the frame of the display panel reaches a predetermined value, At least one side wall part of the two side wall parts of the positioning notch is also provided with a guide post; The card frame part is provided with a guide slot at a position corresponding to the guide post, which can cooperate with the guide post. 4. The backlight module according to claim 1, characterized in that, On the other side where the width of the frame of the display panel reaches a predetermined value, The bottom part of the positioning notch is also provided with an upwardly protruding positioning post, and the positioning lug is provided with a positioning opening that cooperates with the positioning post. 5. The backlight module according to claim 1, characterized in that, The backlight module also includes: The shielding layer arranged on the periphery of the plastic frame and at least covers the positioning notch. 6. A display device, characterized by comprising the backlight module according to any one of claims 1-5.