CN217484638U - Backlight module and display device - Google Patents

Abstract

The utility model relates to the technical field of display, and discloses a backlight module and a display device, wherein the backlight module comprises a back plate and a reflector plate, a light guide plate and an optical diaphragm which are sequentially arranged in an accommodating space of the back plate, the back plate comprises a bottom plate and a plurality of side plates which are vertically arranged around the bottom plate, a light bar is arranged at the inner side of one side plate of the back plate, a plurality of light sources are arranged on the light bar at intervals, and a lampshade is arranged above the light sources; the lampshade comprises a first lampshade part and a second lampshade part, the first lampshade part is arranged at two ends of the lampshade, and the second lampshade part is arranged in the middle of the lampshade; the second lamp shade part is provided with a plurality of first grooves, and a single first groove is arranged between two adjacent light sources. The embodiment of the utility model provides a backlight unit and display device is through the structure redesign with the lamp shade to overcome the not enough problem of lamp shade intensity among the prior art, and then prevent display panel's fragment.

Description

Backlight module and display device

Technical Field

The utility model relates to a show technical field, and especially relate to a backlight module and display device.

Background

The liquid crystal display device is composed of a liquid crystal display panel and a backlight module, and the liquid crystal display panel cannot emit light and can only display images by means of light rays emitted by the backlight module arranged below the liquid crystal display panel, so the design of the backlight module in the liquid crystal display device is also particularly important.

As the thickness of the liquid crystal display device is reduced, the thickness of the back plate is reduced to about 0.2mm to 0.15 mm. In the case where the thickness of the back plate is thin, it follows that the strength of the back plate becomes weak; under the premise, the display panel is easy to have fragments, and the main causes of the fragments are static pressure fragments, dynamic pressure fragments, falling fragments and the like.

Fig. 1 is a top view of a back plate and a rubber frame of a conventional backlight module, fig. 2 is a cross-sectional view taken along a-a ' of fig. 1, fig. 3 is a cross-sectional view taken along B-B ' of fig. 1, and fig. 4 is a cross-sectional view taken along C-C ' of fig. 1. As shown in fig. 1 to 4, the conventional backlight module includes a back plate 1, a reflective sheet 2, a light guide plate 3 and an optical film 4, wherein a light bar 5 and a light source 51' located on the light bar 5 are further disposed on one side of the back plate 1; the tape 9 is used to fix the display panel 8 and the backlight module. As shown in fig. 1, due to the limitation of the production process of the product, the U-shaped portion 100 of the back plate 1 of the conventional backlight module cannot be provided with the lamp shade extending from the back plate 1 of the U-shaped portion 100 to the left and right sides of the back plate 10, and is replaced with the rubber frame 6, the rubber frame 6 is made of resin material PC, which has lower strength than the sheet metal material of the back plate 1, the rubber frame 6 and the back plate 1 arranged below the rubber frame 6 are bonded by using an adhesive tape, the lamp shade 15 'is arranged between the rubber frames 6, and the light shade 7 is arranged above the lamp shade 15'; when a force is applied, the liquid crystal display panel 8 is easily broken due to the fact that the stressed uneven rubber frame 6 is easily inclined. Moreover, the lamp shade 15' also causes the breakage of the liquid crystal display panel due to the problems of the flatness of the lamp shade and the flatness of the mechanical testing pressure head.

Based on the existing problems, it is urgently needed to design a new backlight module and a display device to solve the problems existing in the prior art.

SUMMERY OF THE UTILITY MODEL

In view of this, an embodiment of the present invention provides a backlight module and a display device, which are used to solve the problem that the strength of the back plate of the existing thinning machine is not sufficient.

The embodiment of the utility model provides a backlight module, including backplate and be located reflector plate, light guide plate and the optical diaphragm that sets gradually in the accommodation space of backplate, the backplate includes the bottom plate and centers on a plurality of curb plates that the bottom plate set up perpendicularly, one of them curb plate inboard of backplate is provided with the lamp strip, and interval is provided with a plurality of light sources on this lamp strip, and the top of a plurality of light sources is provided with the lamp shade; the lampshade comprises a first lampshade part and a second lampshade part, the first lampshade part is arranged at two ends of the lampshade, and the second lampshade part is arranged in the middle of the lampshade; the second lamp shade part is provided with a plurality of first grooves, and each first groove is arranged between two adjacent light sources.

Further, the plurality of side plates include a first side plate, a second side plate, a third side plate and a fourth side plate, and the lamp shade is located on the inner side of the third side plate.

Furthermore, a reflecting plate is arranged between the lampshade and the light sources, a plurality of second grooves corresponding to the first grooves are arranged on the reflecting plate, and the first grooves are nested in the second grooves.

Furthermore, the lamp shade is kept away from the surface of reflecting plate still is provided with the light shield layer, the light shield layer with the surface that the lamp shade contacts is provided with a plurality of first lugs, first lug is located in the first recess.

Further, the height of the first groove is less than or equal to one half of the height of the light source.

Furthermore, a plurality of third grooves are arranged on one side of the light guide plate close to the light source, and the third grooves are used for accommodating the edges of the first grooves far away from the third side plate.

Further, the bottom plate of the first groove is arranged to be an inclined structure, and the bottom surface of the third groove of the light guide plate is arranged to be an inclined surface.

Further, a connecting portion is arranged between the third side plate and the first groove.

Further, a gap is arranged between the first lampshade part and the second lampshade part.

An embodiment of the utility model provides a pair of display device, include display panel and the backlight unit who has above-mentioned technical characteristic.

In summary, according to the backlight module and the display device provided by the embodiment of the present invention, the lamp cover is provided as the first lamp cover portion and the second lamp cover portion, and the first lamp cover portion and the second lamp cover portion are made of metal plate materials, so that the problem of non-uniform stress due to non-uniform compression between the rubber frame and the back plate can be solved; the light source comprises a first light source body, a second light source body, a reflecting plate, a first light source cover, a second light source cover, a light shading layer, a plurality of first grooves, a plurality of second grooves, a plurality of first convex blocks, a plurality of first grooves, a plurality of second grooves and a plurality of first convex blocks, wherein the first grooves, the second grooves and the first convex blocks are arranged in a mutually nested mode.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a top view of a back plate and a rubber frame of a conventional backlight module;

FIG. 2 is a cross-sectional view taken along A-A' of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B' of FIG. 1;

FIG. 4 is a cross-sectional view taken along line C-C' of FIG. 1;

fig. 5 is a top view of a back plate and a rubber frame of a backlight module according to an embodiment of the present invention;

FIG. 6 is a cross-sectional view taken along line D-D' of FIG. 5;

FIG. 7 is a cross-sectional view taken along line E-E' of FIG. 5;

fig. 8 is a schematic view of a side plate and a lampshade provided in an embodiment of the present invention;

fig. 9 is a top view of a back plate and a lamp cover of a backlight module according to an embodiment of the present invention;

fig. 10 is a top view of a light guide plate of a backlight module according to an embodiment of the present invention;

FIG. 11 is a sectional view taken along part G-G' of FIG. 10;

fig. 12 is a perspective view of a light guide plate of a backlight module according to an embodiment of the present invention.

Description of reference numerals:

100, a U-shaped part; 1/10, a back panel; 11, a first side plate; 12, a second side plate; 13-a third side panel; 14, a fourth side plate;

2/20, a reflective sheet;

3/30, a light guide plate; 31/31', a third groove;

4/40, optical films;

5/50, light bars; 51'/51, light source; 15-lamp shade; 151, a first lamp shade portion; 152, a second lamp housing portion; 1520/1520', a first groove; 52, a reflector plate; 521, a second groove;

6/60, a rubber frame;

7/70, a light-shielding layer; 701, a first bump;

80, a display panel;

9/90, adhesive tape.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.

An embodiment of the utility model provides a backlight module and display device, display device include backlight module and display panel, and this backlight module sets up in display panel's below, and this display panel is liquid crystal display panel, including array substrate and colored filter substrate and press from both sides the liquid crystal layer of establishing between the two. Since the liquid crystal display panel itself can not emit light, the backlight module disposed below the liquid crystal display panel is required to emit light to display a normal image.

Fig. 5 is a top view of a back plate and a rubber frame of a backlight module according to an embodiment of the present invention, fig. 6 is a cross-sectional view taken along D-D 'of fig. 5, and fig. 7 is a cross-sectional view taken along E-E' of fig. 5; as shown in fig. 5 to 7, the back plate 10 includes a bottom plate, a first side plate 11, a second side plate 12, a third side plate 13, and a fourth side plate 14; the first side plate 11 and the second side plate 12 are oppositely arranged, and the third side plate 13 and the fourth side plate 14 are oppositely arranged; the first side plate 11, the second side plate 12, the third side plate 13, the fourth side plate 14 and the bottom plate jointly form an accommodating space, the bottom plate is located at the bottom surface of the accommodating empty surface, and the first side plate 11, the second side plate 12, the third side plate 13 and the fourth side plate 14 are arranged around the bottom plate and are vertically connected with the bottom plate.

A reflector 20, a light guide plate 30 and an optical film 40 are sequentially arranged in the accommodating space formed by the back plate 10; the reflective sheet 20 is directly disposed on the bottom plate to reflect light, which passes through the light guide plate 30 and is reflected to the reflective sheet 20, back to the light guide plate 30, thereby increasing the utilization rate of light. The light guide plate 30 is disposed above the reflective sheet 20, and is used to convert light emitted from the light source into a surface light source, so that the light is emitted from the light emitting side of the light guide plate 30 and enters the display panel 80, and the display device displays images normally. It should be noted here that the lower surface of the light guide plate 30 is provided with a plurality of dots. Further, the optical film sheet 40 is disposed above the light guide plate 30, and preferably, the optical film sheet 40 may be a multi-layer film, respectively a prism sheet, a brightness enhancement film, a diffusion film, and the like, and may be specifically disposed according to a specific product, which is not limited herein.

Further, the first side plate 11, the second side plate 12 and the fourth side plate 14 are not provided with light sources on three sides, and the light source is arranged on one side of the third side plate 13. Specifically, the light bar 50 is in contact with the base plate. The light bar 50 is provided with a plurality of light sources 51 at intervals, the light sources 51 are LEDs, the light bar 50 is preferably a printed circuit board, and a plurality of lines of the light sources 51 are provided on the printed circuit board, and the lines are used for respectively connecting the plurality of light sources 51 and controlling the plurality of light sources 51 to be turned on and off.

Further, as shown in fig. 5, the glue frame 60 is disposed on the non-light source side, that is, the glue frame 60 is disposed on the inner sides of the first side plate 11, the second side plate 12 and the fourth side plate 14, the bottom surface of the glue frame 60 is in contact with the bottom plate, the inner side of the glue frame 60 provides a spacing space for the reflective sheet 20, the light guide plate 30 and the optical film 40, and the top of the glue frame 60 provides a support for the display panel 80.

As shown in fig. 6, the lampshade 15 is located above the light bar 50 (i.e. above the plurality of light sources 51), and the lampshade 15 is used for preventing light emitted by the plurality of light sources from being emitted from the top. The lamp housing 15 includes a first lamp housing portion 151 and a second lamp housing portion 152, the first lamp housing portion 151 is located at two ends of the lamp housing 15, the second lamp housing portion 152 is located at a middle position of the lamp housing 15, and the first lamp housing portion 151 and the second lamp housing portion 152 can be connected together or arranged at intervals. It should be noted that, when the first lamp cover portion 151 and the second lamp cover portion 152 are connected together, the back plate 10 may be formed by punching and then welding the lamp cover 15 to the back plate 10. When the first lamp shade portion 151 and the second lamp shade portion 152 are disposed at an interval, that is, a gap is disposed between the first lamp shade portion 151 and the second lamp shade portion 152, the back plate 10 and the second lamp shade portion 152 may be integrally formed, and then the first lamp shade portion 151 is welded to the back plate 10 and the second lamp shade portion 152 by welding, or an adhesive tape may be disposed below the first lamp shade portion 151 to fix the first lamp shade portion 151 to the adhesive tape of the light source. The first and second cover portions 151 and 152 are spaced apart from each other, thereby facilitating the integral formation of the back plate and the lamp housing. The side of the lampshade 15 close to the back plate 10 is vertically connected with the third side plate 13, and the lampshade 15 is positioned at the inner side of the third side plate 13. A reflective plate 52 is disposed between the lamp housing 15 and the plurality of light sources 51 for reflecting light emitted from the light sources 51 back to the light sources 51, wherein the reflective plate 52 may be implemented by providing a white coating layer on a side on which the light is reflected. A light shielding layer 70 is further provided on the surface of the globe 15 away from the reflector 52, and the light shielding layer 70 prevents light from being emitted from above the globe 15 and affecting the image display of the display device.

Further, a plurality of first grooves 1520 are disposed on the second lamp housing portion 152, a single first groove 1520 is located between two adjacent light sources 51, the height of the first groove 1520 is less than the height of the light source 51, and preferably, the height of the first groove 1520 is less than or equal to half of the height of the light source 51. Suitably, a second groove 521 corresponding to the first groove 1520 is also disposed on the reflective plate 52, the second groove 521 is located between two adjacent light sources 51, and the first groove 1520 is embedded in the second groove 521. Suitably, a first bump 701 is disposed on the lower surface of the light shielding layer 70 at a position corresponding to the first groove 1520, and the first bump 701 is located in the first groove 1520. It should be noted that the number of the first recess 1520, the second recess 521 and the first protrusion 701 is the same, and the positions are correspondingly arranged. Preferably, the light shielding layer 70 is made of elastic rubber.

Fig. 7 is a cross-sectional view of the second cover portion 152 along the first groove 1520, and as can be seen from fig. 7, a connecting portion 153 is further disposed between the third side plate 13 and the first groove 1520, and the connecting portion 153 is a connecting portion between the third side plate 13 of the back plate 10 and the lamp cover 15, and the disposition of the connecting portion can facilitate the integral component of the third side plate 13 and the lamp cover 15. Correspondingly, a connecting portion, not shown, may also be provided between the first lamp cover portion 151 and the third side plate 13. Fig. 8 is a simplified schematic view of a side plate and a lampshade according to an embodiment of the present invention, as shown in (1) of fig. 8, a bottom surface of the first groove 1520 is perpendicular to the third side plate 13; as shown in (2) of fig. 8, the bottom surface of the first groove 1520 'forms an angle of more than 90 degrees with the third side plate 13, i.e., the bottom surface of the first groove 1520' has an inclined structure.

Fig. 9 is a top view of a back plate and a lamp cover of a backlight module according to an embodiment of the present invention, as shown in fig. 9, a plurality of first recesses 1520 are disposed on the lamp cover 15, two adjacent first recesses 1520 are disposed at equal intervals, and a light source (not shown in the figure) is disposed between the two adjacent first recesses 1520.

Fig. 10 is a top view of a light guide plate of a backlight module according to an embodiment of the present invention, fig. 11 is a partial sectional view along G-G' of fig. 10, and fig. 12 is a perspective view of the light guide plate of the backlight module according to an embodiment of the present invention, as shown in fig. 10-12, a plurality of third grooves 31 are also adaptively disposed on the light guide plate 30, and the third grooves 31 are adapted to the size of the first groove 1520 of the lamp cover 15, so that one side of the first groove 1520 of the lamp cover 15 extends to the third groove 31 of the light guide plate 30, that is, the third groove 31 is used for accommodating the edge of the first groove 1520 away from the third side plate 13. Since the bottom surface of the first groove 1520 may be provided in an inclined structure, corresponding to the light guide plate 30, as shown in (2) of fig. 11, the bottom surface of the third groove 31 of the light guide plate 30 is also adaptively provided as an inclined surface.

The embodiment of the utility model provides a still provide a display device, this display device includes backlight unit and display panel 80, and display panel 80 sets up in backlight unit's top, and the light that backlight unit sent sees through display panel 80 to make display device normally show the picture. When the backlight module and the display panel 80 are assembled together, they are fixed by an adhesive tape 90, as shown in fig. 7, where the adhesive tape 90 is preferably a Mylar adhesive tape.

The embodiment of the utility model provides a backlight module and display device, through setting up the lamp shade as first lamp cover body and second lamp cover body, first lamp cover body and second lamp cover body all adopt the panel beating material, can solve the problem that the volume of compression of frame and backplate is inconsistent and then the atress is uneven; be provided with a plurality of first recesses on second lamp shade portion, be provided with a plurality of second recesses on the reflecting plate, be provided with a plurality of first lugs on the light shield layer, this first recess, second recess and first lug, it sets up nested each other, under the prerequisite that does not increase backlight unit's thickness, increases the thickness of lamp shade through utilizing the clearance between the light source to promote the intensity of lamp shade.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any introduction modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention will still fall within the scope of the technical solution of the present invention.

Claims (10)

1. A backlight module comprises a back plate, and a reflecting plate, a light guide plate and an optical diaphragm which are sequentially arranged in an accommodating space of the back plate, and is characterized in that the back plate comprises a bottom plate and a plurality of side plates which are vertically arranged around the bottom plate, a light bar is arranged on the inner side of one side plate of the back plate, a plurality of light sources are arranged on the light bar at intervals, and a lampshade is arranged above the light sources; the lampshade comprises a first lampshade part and a second lampshade part, the first lampshade part is arranged at two ends of the lampshade, and the second lampshade part is arranged in the middle of the lampshade; the second lamp shade part is provided with a plurality of first grooves, and a single first groove is arranged between two adjacent light sources.

2. The backlight module according to claim 1, wherein the plurality of side plates comprises a first side plate, a second side plate, a third side plate and a fourth side plate, and the lamp cover is positioned inside the third side plate.

3. The backlight module as claimed in claim 2, wherein a reflective plate is disposed between the lamp housing and the plurality of light sources, the reflective plate having a plurality of second grooves corresponding to the first grooves, the first grooves being nested in the second grooves.

4. The backlight module as claimed in claim 3, wherein a light shielding layer is further disposed on a surface of the lamp cover away from the reflector, a plurality of first bumps are disposed on a surface of the light shielding layer contacting the lamp cover, and the first bumps are disposed in the first grooves.

5. The backlight module as claimed in claim 1, wherein the height of the first recess is less than or equal to one half of the height of the light source.

6. The backlight module as claimed in claim 2, wherein a side of the light guide plate adjacent to the light source is provided with a plurality of third recesses for receiving edges of the first recesses remote from the third side plate.

7. The backlight module according to claim 6, wherein the bottom plate of the first groove is formed in an inclined structure, and the bottom surface of the third groove of the light guide plate is formed in an inclined surface.

8. The backlight module according to claim 2, wherein a connection portion is disposed between the third side plate and the first recess.

9. The backlight module according to claim 1, wherein a gap is provided between the first lamp cover portion and the second lamp cover portion.

10. A display device comprising a display panel and a backlight module according to any one of claims 1 to 9.

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