CN116909050A - display device - Google Patents

Abstract

A display device is disclosed, which includes a backlight module, a liquid crystal display panel and a front frame. The liquid crystal display panel includes a light emitting surface. The backlight module is stacked on a side of the liquid crystal display panel away from the light emitting surface. The backlight module includes a first side middle frame located on the driving side of the display device, the front frame includes a first front frame side wall located on the driving side, and the first front frame side wall is connected to the first side middle frame. The side middle frames are fixedly connected through the fixing part; the display device also includes a flexible circuit board located on the driving side, at least part of the flexible circuit board is located on the first side middle frame and the first front frame side wall between; the first front frame side wall includes an opening, the opening is closer to the light-emitting surface than the fixing part in the thickness direction of the liquid crystal display panel, and the opening is located at the There is no overlap between the orthographic projection on the light-emitting surface and the orthographic projection of the fixing part on the extended surface of the light-emitting surface.

Description

display device

Technical field

The present disclosure relates to the field of display technology, and in particular to a display device.

Background technique

The liquid crystal display device includes a liquid crystal display panel, a backlight module and a front frame. The liquid crystal display panel is fixed on the light-emitting side of the backlight module. The backlight module is used to provide a light source for the liquid crystal display panel. The front frame and the backlight module are fixedly connected and can be The entire display device plays a role of fixation and protection.

Contents of the invention

The present disclosure provides a display device, including a backlight module, a liquid crystal display panel and a front frame. The liquid crystal display panel includes a light emitting surface. The backlight module is stacked on a side of the liquid crystal display panel away from the light emitting surface. , characterized in that the backlight module includes a first side middle frame located on the driving side of the display device, the front frame includes a first front frame side wall located on the driving side, and the first front frame side The wall and the first side middle frame are fixedly connected through a fixing part;

The display device further includes a flexible circuit board located on the driving side, at least part of the flexible circuit board is located between the first side middle frame and the first front frame side wall;

The first front frame side wall includes an opening, the opening is closer to the light-emitting surface extension surface than the fixing part in the thickness direction of the liquid crystal display panel, and the opening is in the There is no overlap between the orthographic projection on the light-emitting surface and the orthographic projection of the fixing part on the extended surface of the light-emitting surface.

In some embodiments, the orthographic projection on the reference surface of the flexible circuit board overlaps with the orthographic projection of the opening on the reference surface; the reference surface is parallel to the first front frame side wall. plane.

In some embodiments, the flexible circuit board includes a connected first connecting portion, a second connecting portion and a bending portion, and the first connecting portion is a portion on the flexible circuit board that is electrically connected to the liquid crystal display panel. The second connecting portion is a portion located between the first side middle frame and the first front frame side wall and extending along the first front frame side wall away from the light-emitting surface. , the bent portion is connected to the first connecting portion and the second connecting portion respectively;

The opening portion includes an upper edge of the opening portion and a lower edge of the opening portion. The upper edge of the opening portion is closer to the light-emitting surface than the lower edge of the opening portion. Wherein, the distance from the upper edge of the opening portion to the extension surface of the light-emitting surface The distance is smaller than the distance from the bending part to the light-emitting surface extension surface, and the distance from the lower edge of the opening part to the light-emitting surface extension surface is greater than the distance from the bending part to the light-emitting surface extension surface.

In some embodiments, the liquid crystal display panel includes a stacked first substrate and a second substrate, and a liquid crystal layer located between the first substrate and the second substrate, and the light exit surface is located on the third substrate. A side of a substrate away from the second substrate; the second substrate protrudes from the first substrate on the driving side to form a protruding portion, and a side of the protruding portion facing the light-emitting surface The side has a binding area, the flexible circuit board is electrically connected to the binding area, and is bent between the first side middle frame and the first front frame side wall and along the first front frame The side wall extends toward the side away from the light-emitting surface;

The opening portion includes an upper edge of the opening portion and a lower edge of the opening portion. The upper edge of the opening portion is closer to the light-emitting surface extension surface than the lower edge of the opening portion. The protruding portion faces the light-emitting surface extension surface. The distance from one side surface of the opening to the extended surface of the light-emitting surface is greater than the distance from the upper edge of the opening to the extended surface of the light-emitting surface, and the distance from the side surface of the protrusion facing the light-emitting surface to the light-emitting surface The distance is smaller than the distance from the lower edge of the opening to the extended surface of the light-emitting surface.

In some embodiments, the liquid crystal display panel includes a stacked first substrate and a second substrate, and a liquid crystal layer located between the first substrate and the second substrate, and the light exit surface is located on the third substrate. A side of a substrate away from the second substrate; the second substrate protrudes from the first substrate on the driving side to form a protruding portion, and a side of the protruding portion facing the light-emitting surface The side has a binding area, the flexible circuit board is electrically connected to the binding area, and is bent between the first side middle frame and the first front frame side wall and along the first front frame The side wall extends toward the side away from the light-emitting surface;

The opening portion includes an upper edge of the opening portion and a lower edge of the opening portion. The orthographic projection of the upper edge of the opening portion on the reference plane and the orthographic projection of the lower edge of the opening portion on the reference plane are respectively located on the protruding portion. The side surface extending toward the light-emitting surface is on opposite sides of the orthographic projection on the reference plane; the reference plane is a plane parallel to the side wall of the first front frame.

In some embodiments, the upper edge of the opening and the lower edge of the opening are located on the same side of the extension surface of the light exit surface.

In some embodiments, the distance from the surface on the side of the second substrate away from the light-emitting surface to the light-emitting surface extension surface is smaller than the distance from the lower edge of the opening to the light-emitting surface extension surface.

In some embodiments, the number of the openings is multiple, and the orthographic projection of at least one fixed portion on the extension surface of the light exit surface is located on the extension surface of the light exit surface of two adjacent openings. between the orthographic projections.

In some embodiments, the openings located on both sides of the same fixing part are mirror symmetrical.

In some embodiments, the flexible circuit board includes a first edge and a second edge arranged side by side in its width direction;

A part of the orthographic projection of the first edge parallel to the reference plane and a part of the orthographic projection of the second edge on the reference plane are located within the orthographic projection range of the opening on the reference plane. Inside; the reference plane is a plane parallel to the side wall of the first front frame.

In some embodiments, the orthographic projection of the first edge and the second edge of the same flexible circuit board on the reference surface overlaps with the orthographic projection of the same opening on the reference surface; or ,

The orthographic projections of the first edge and the second edge of the same flexible circuit board on the reference surface respectively overlap with the orthographic projections of different openings on the reference surface.

In some embodiments, at least one end of the opening exceeds the flexible circuit board in the length direction of the opening, and the length of the excess portion is greater than or equal to 2 mm.

In some embodiments, the opening includes an upper edge and a lower edge, the upper edge of the opening is closer to the light exit surface than the lower edge of the opening, and the upper edge of the opening reaches the third The distance between the top ends of a front frame side wall is between 1 mm and 1.5 mm. The top end of the first front frame side wall is the end of the first front frame side wall close to the upper edge of the opening.

In some embodiments, the size of the opening along the thickness direction of the liquid crystal display panel is between 1.5 mm and 2 mm.

In some embodiments, the opening includes a through hole penetrating the side wall of the first front frame;

Alternatively, the opening includes a plurality of slits penetrating the side wall of the first front frame, and the plurality of slits are arranged along a thickness direction of the liquid crystal display panel;

Alternatively, the opening includes: a plurality of grooves provided on a side of the first front frame side wall facing the first side middle frame and/or a side away from the first side middle frame. , the depth of the groove is smaller than the thickness of the side wall of the first front frame; multiple grooves on the same side are arranged along the thickness direction of the backlight module.

In some embodiments, the opening includes: a plurality of openings provided on a side of the first front frame side wall facing the first side middle frame and a side away from the first side middle frame. Grooves, the grooves on both sides of the first front frame side wall are staggered in the thickness direction of the backlight module.

In some embodiments, the opening includes a plurality of grooves, the depth of the grooves is less than or equal to 70% of the thickness of the first front frame side wall, and is located on the same side of the first front frame side wall. The distance between two adjacent grooves is greater than or equal to twice the width of the grooves.

In some embodiments, a plurality of the flexible circuit boards are provided on each driving side, and the fixing portions are provided on both sides of each flexible circuit board along its width direction.

In some embodiments, the backlight module further includes a back panel, the back panel includes connected back panel side walls and a back panel bottom wall, the first side middle frame is provided with a slit, and the slit is There is an opening facing the plane of the bottom wall, and a part of the side wall of the back plate away from the bottom wall of the back plate is inserted into the slot through the opening;

The first side middle frame includes a first sub-middle frame located between the back panel side wall and the first front frame side wall, and the first front frame side wall is connected to the third side through the fixing part. A sub-middle frame is connected to the side walls of the back panel.

In some embodiments, the backlight module further includes an optical film set, the first side middle frame supports the optical film set, and the liquid crystal display panel is located away from the optical film set and the backlight module. One side of the bottom wall of the board;

The backlight is located between the bottom wall of the back plate and the optical film set.

In some embodiments, the backlight module further includes a backplane, and the front frame further includes a second front frame side wall located on the non-driving side of the display device, and each of the second front frame side walls is connected to each of the The side walls of the first front frame are connected and surround the back panel;

The top ends of the first front frame side wall and the top ends of the second front frame side wall are both bent to form a bent portion that at least partially covers the non-display area of the liquid crystal display panel.

Description of the drawings

The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. They are used to explain the present disclosure together with the following specific embodiments, but do not constitute a limitation of the present disclosure. In the attached picture:

1 is a cross-sectional view of a driving side of a display device provided in some embodiments of the present disclosure.

Figure 2 is an enlarged view of area A in Figure 1.

3 is another cross-sectional view of the driving side of the display device provided in some embodiments of the present disclosure.

Figure 4 is an enlarged view of area B in Figure 3.

Figure 5 is a schematic diagram of the size markings in Figure 4.

FIG. 6 is yet another cross-sectional view of the driving side of the display device provided in some embodiments of the present disclosure.

Figure 7 is a side view of a first front frame side wall provided in some embodiments of the present disclosure.

Figure 8 is another side view of the first front frame provided in some embodiments of the present disclosure.

9 is a cross-sectional view of a non-driving side of a display device provided in some embodiments of the present disclosure.

Detailed ways

Specific embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some, but not all, of the embodiments of the present disclosure. Based on the described embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present disclosure.

Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure shall have the usual meanings understood by those with ordinary skill in the field to which the disclosure belongs. "First", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Likewise, words such as "includes" or "includes" mean that the elements or things listed before the word include the elements or things listed after the word and their equivalents, without excluding other elements or things. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to express relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

As used herein, "parallel" and "perpendicular" include the stated situation and situations that are approximate to the stated situation, and the range of the approximate situation is within an acceptable deviation range, where the acceptable deviation Ranges are as determined by one of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of the particular quantity (ie, the limitations of the measurement system). For example, "parallel" includes absolutely parallel and approximately parallel, and the acceptable deviation range of approximately parallel may be, for example, within 10°; "perpendicular" includes absolutely vertical and approximately vertical, and the acceptable deviation range of approximately vertical may also be, for example, Deviation within 10°.

It will be understood that when a layer or element is referred to as being on another layer or substrate, this can mean that the layer or element is directly on the other layer or substrate, or that the layer or element can be coupled to the other layer or substrate There is an intermediate layer in between.

Example embodiments are described herein with reference to cross-sectional illustrations and/or plan views that are idealized illustrations. In the drawings, the thickness of layers and regions are exaggerated for clarity. Accordingly, variations from the shapes in the drawings due, for example, to manufacturing techniques and/or tolerances are contemplated. Thus, example embodiments should not be construed as limited to the shapes of regions illustrated herein but are to include deviations in shapes that result from, for example, manufacturing. Accordingly, the regions shown in the figures are schematic in nature and their shapes are not intended to illustrate the actual shapes of regions of the device and are not intended to limit the scope of the exemplary embodiments.

It should be noted that the expressions about the numerical range “m1～m2” in the embodiments of the present disclosure include the endpoint values m1 and m2.

Figure 1 is a cross-sectional view of the driving side of the display device provided in some embodiments of the present disclosure. Figure 2 is an enlarged view of area A in Figure 1. Figure 3 is another view of the driving side of the display device provided in some embodiments of the present disclosure. Cross-sectional view, Figure 4 is an enlarged view of area B in Figure 3, Figure 5 is a schematic diagram of the size marks in Figure 4, Figure 6 is another cross-sectional view of the driving side of the display device provided in some embodiments of the present disclosure, Figure 7 is a cross-sectional view of the driving side of the display device provided in some embodiments of the present disclosure. A side view of the side wall of the first front frame provided in some disclosed embodiments. FIG. 8 is another side view of the first front frame provided in some embodiments of the present disclosure. Among them, the cross-sectional view shown in Figure 1 corresponds to the position of line A-A' in Figure 7, and the cross-sectional view shown in Figure 3 corresponds to the position of line B-B' in Figure 7.

As shown in Figures 1 to 4, the display device includes: a backlight module, a liquid crystal display panel 10 and a front frame. The liquid crystal display panel 10 includes a light emitting surface 11a, which is the light emitting surface 11a that faces the user during use of the liquid crystal display panel 10. s surface. The backlight module is stacked on the side of the liquid crystal display panel 10 away from the light emitting surface. The backlight module includes a first side middle frame 21 located on the driving side of the display device; the front frame includes a first front frame side wall 31 located on the driving side, and the first front frame side wall 31 and the first side middle frame 21 pass through the first side middle frame 21 . A fixed part 91 is fixedly connected.

The driving side of the display device refers to the side connected to the driving circuit board 60 . In some embodiments, a display device may have one drive side or multiple drive sides. For example, the display device has a rectangular structure, and one side of the display device is the driving side, or both adjacent sides are the driving sides.

The display device may include a middle frame. The first side middle frame 21 is a portion of the middle frame located on the driving side; and the first front frame side wall 31 is a portion of the front frame located on the driving side.

As shown in FIGS. 2 to 4 , the display device further includes a flexible circuit board 40 located on the driving side. The flexible circuit board 40 is at least partially located between the first side middle frame 21 and the first front frame side wall 31 . The flexible circuit board 40 is used to connect the liquid crystal display panel 10 and the driving circuit board 40 so as to provide the driving signal of the driving circuit board 40 to the liquid crystal display panel 10 to drive the liquid crystal display panel 10 to display.

In one example, the first fixing member 91 may be a fastening screw.

As shown in FIGS. 1 and 2 , during the testing process or use of the display device, the first side middle frame 21 expands when heated and shrinks when cooled. When the first front frame side wall 31 and the first side middle frame 21 are fixed, the deformation of the middle frame will pull the front frame, causing the front frame to be displaced or deformed. When the displacement or deformation of the front frame reaches a certain condition, the flexible circuit board 40 will be squeezed, causing damage to the flexible circuit board 40 and thus affecting the display screen of the liquid crystal display panel.

In order to solve the problem of the deformation of the front frame causing extrusion of the flexible circuit board 40, in the embodiment of the present disclosure, as shown in Figures 2, 4 to 6, an opening 311 is provided on the first front frame side wall 31, The opening 311 is closer to the light emitting surface 11 a than the first fixing part 91 in the thickness direction of the liquid crystal display panel 10 . Furthermore, there is no overlap between the orthographic projection of the opening 311 on the extended surface of the light-emitting surface 11a and the orthographic projection of the first fixing part 91 on the extended surface of the light-emitting surface 11a.

The opening 311 may have a structure that penetrates the first front frame side wall 31 along the thickness direction of the first front frame side wall 31 , or may have a structure that does not completely penetrate the first front frame side wall 31 .

It should be noted that when the light-emitting surface 11a is a flat surface, the extending surface of the light-emitting surface 11a is the extending surface of the light-emitting surface 11a; when the light-emitting surface 11a is a curved surface, the extending surface of the light-emitting surface 11a is the extending surface of the curved surface. .

In the embodiment of the present disclosure, the first front frame side wall 31 includes an opening 311. When the first front frame side wall 31 contracts, the lateral pressing force on the flexible circuit board 40 will be released through the opening 311, thereby The squeezing force of the first front frame side wall 31 on the flexible circuit board 40 is reduced, thereby reducing damage to the flexible circuit board 40 and improving the display effect of the display device.

In addition, in order to prevent the first fixing part 91 from affecting the arrangement of the flexible circuit board 40, the orthographic projection of the flexible circuit board 40 on the extended surface of the light-emitting surface 11a does not overlap with the orthographic projection of the first fixing part 91 on the extended surface of the light-emitting surface 11a. In the embodiment of the present disclosure, the orthographic projection of the opening 311 on the extended surface of the light-emitting surface 11a does not overlap with the orthographic projection of the first fixing part 91 on the extended surface of the light-emitting surface 11a. That is, the position of the opening 311 and the flexible circuit The position of the plate 40 is adapted so that the opening 311 can effectively release the above-mentioned lateral pressing force while preventing the opening 311 from being too large and affecting the support strength of the first front frame side wall 31 .

In some embodiments, the material of the first side middle frame 21 may be organic materials such as resin.

In some embodiments, as shown in FIG. 3 , a first mounting hole V1 is provided on the first front frame side wall 31 , and the first fixing portion 91 passes through the first mounting hole V1 . For example, the first side middle frame 21 is provided with a second mounting hole V2, and the first fixing part 91 passes through the first mounting hole V1 and the second mounting hole V2 and is connected to the back panel 50; the first fixing part 91 may include screws. In one example, the diameter of the first mounting hole V1 may be between 3.5 mm and 4.5 mm. For example, the diameter of the first mounting hole V1 is 4 mm.

In some embodiments, as shown in FIG. 3 , the first front frame side wall 31 has a first bending portion 31 b that is bent toward the first side middle frame 21 , and the first mounting hole V1 is provided on the first bending portion 31 b. The design of the first curved portion 31b can prevent the fixing portion from protruding from the first front frame side wall 31, thereby improving the flatness of the entire side surface of the display device and reducing the frame width of the display device.

In some embodiments, as shown in FIGS. 7 and 8 , the shortest distance C0 between the center of the first mounting hole V1 and the opening 311 in the length direction of the first front frame side wall 31 is between 6 mm and 8 mm, so that While allowing the opening 311 to release the above-mentioned lateral pressing force, the opening 311 is prevented from being too large and affecting the supporting strength of the first front frame side wall 31 . For example, the diameter of the first mounting hole V1 is 4 mm, and the shortest distance between the first mounting hole V1 and the opening 311 in the length direction of the first front frame side wall 31 is 6 mm, or 7 mm, or 8 mm.

The length direction of the first front frame side wall 31 refers to a direction perpendicular to both the height direction of the liquid crystal display panel 10 and the thickness direction of the first front frame side wall 31 .

In some embodiments, the orthographic projection of the flexible circuit board 40 on the reference plane overlaps with the orthographic projection of the opening 311 on the reference plane, thereby more effectively reducing the impact of the first front frame side wall 31 on the flexible circuit board 40 of squeezing force.

In some embodiments, as shown in FIG. 4 , the flexible circuit board 40 includes: a connected first connecting part 41 , a second connecting part 42 and a bending part 43 . The first connection part 41 is a part of the flexible circuit board 40 that is electrically connected to the liquid crystal display panel 10 . The second connection part 42 is located between the first side middle frame 21 and the first front frame side wall 31 and along the first front frame. The bent portion 43 of the side wall 31 extending away from the light-emitting surface 11 a is connected to the first connecting portion 41 and the second connecting portion 42 respectively.

The liquid crystal display panel 10 includes a display area and a non-display area. The non-display area includes a bonding pad area, and a bonding pad is provided in the bonding pad area. The electrical connection between the flexible circuit board 40 and the liquid crystal display panel 10 means that the flexible circuit board 40 and the liquid crystal display panel 10 are electrically connected. The pad bonding connection of the liquid crystal display panel 10 . The boundary line between the first connecting part 41 and the bending part 43 is the corresponding position on the flexible circuit board 40 where the binding area is away from the boundary of the display area of the liquid crystal display panel 10 .

It should be noted that the second connecting portion 42 “extends along the first front frame side wall 31 toward the side away from the light emitting surface 11a” means that the overall extending trend of the second connecting portion 42 is toward the side away from the light emitting surface 11a. , does not mean that the second connecting portion 42 must be flat. For example, a protrusion 40v may be formed on the flexible circuit board 40 in a portion extending along the first front frame side wall 31 away from the light-emitting surface 11a. The protrusion 40v may prevent the flexible circuit board 40 from being stressed. ruptured later.

In some embodiments, as shown in Figures 2, 4 and 5, the opening 311 includes an upper edge of the opening and a lower edge of the opening, and the upper edge of the opening is closer to the light-emitting surface 11a than the lower edge of the opening, wherein the opening 311 The distance d1 from the upper edge to the extended surface of the light-emitting surface 11a is smaller than the distance d3 from the bent portion 43 to the extended surface of the light-emitting surface 11a. The distance d2 from the lower edge of the opening to the extended surface of the light-emitting surface 11a is greater than the distance d2 from the bent portion 43 to the extended surface of the light-emitting surface 11a. Distance d3.

It should be noted that the upper edge of the opening refers to the upper edge of the entire structure of the opening 311 in the thickness direction of the liquid crystal display panel 10; the lower edge of the opening refers to the lower edge of the entire structure of the opening 311 in the thickness direction of the liquid crystal display panel 10. Edge; for example, if the opening 311 includes a through hole, then the upper edge of the opening is the upper edge of the entire through hole; the lower edge of the opening is the lower edge of the entire through hole. For another example, the opening 311 includes a plurality of slits arranged in the thickness direction of the liquid crystal display panel 10. In this case, the upper edge of the opening is the upper edge of the overall structure composed of multiple slits; the lower edge of the opening is the upper edge of the entire structure. The lower edge of the overall structure composed of slits.

It should also be noted that in the embodiment of the present disclosure, the distance from a certain structure to the light exit surface 11 a refers to the distance between the structure and the light exit surface 11 a in the thickness direction of the liquid crystal display panel 10 .

Compared with other positions, the bent portion 43 of the flexible circuit board 40 is more likely to be damaged when being squeezed. Therefore, when the distance d1 from the upper edge of the opening to the light-emitting surface 11a is smaller than the distance d1 from the upper edge of the opening to the light-emitting surface 11a, it is smaller than the distance d1 from the upper edge of the opening to the light-emitting surface 11a. d3. When the distance d2 from the lower edge of the opening to the light-emitting surface 11a is greater than the distance d3 from the bending part 43 to the light-emitting surface 11a, it is beneficial to relieve the stress of the squeezing force on the bending part 43 and reduce the possibility of damage to the flexible circuit board 40. sex.

In some embodiments, as shown in FIG. 4 , the liquid crystal display panel 10 includes a stacked first substrate 11 and a second substrate 12 , and a liquid crystal layer (not shown) located between the first substrate 11 and the second substrate 12 . ), the light-emitting surface 11 a is located on the side of the first substrate 11 away from the second substrate 12 . The second substrate 12 protrudes from the first substrate 11 on the driving side to form a protruding portion 12a, and has a binding area on the side of the protruding portion 12a facing the light-emitting surface 11a. The flexible circuit board 40 is electrically connected to the binding area, and is bent between the first side middle frame 21 and the first front frame side wall 31 and extends along the first front frame side wall 31 toward the side away from the light emitting surface 11a. .

The opening 311 includes an upper edge of the opening and a lower edge of the opening. The upper edge of the opening is closer to the light-emitting surface 11 a than the lower edge of the opening. Among them, the distance d4 from the side surface of the protruding portion 12a facing the light-emitting surface 11a (that is, the upper surface of the protruding portion 12a) to the light-emitting surface 11a is greater than the distance d1 from the upper edge of the opening to the light-emitting surface 11a. The distance d4 from the surface to the light-emitting surface 11a is smaller than the distance d2 from the lower edge of the opening to the light-emitting surface 11a. In this case, the flexible circuit board 40 can be opened due to the extrusion force at the position corresponding to the edge of the upper surface of the protruding portion 12a. Department 311 release.

In some embodiments, the opening portion includes an upper edge of the opening portion and a lower edge of the opening portion, wherein, in the case where the backlight module includes a back plate 50 , the lower edge of the opening portion is closer to the bottom wall 52 of the back plate 50 than the upper edge of the opening portion.

The orthographic projection of the upper edge of the opening on the reference plane and the orthographic projection of the lower edge of the opening on the reference plane are respectively located on opposite sides of the orthographic projection of the upper surface of the protruding portion 12a on the reference plane; where, the reference planes are parallel on the plane of the first front frame side wall 31. In this case, the stress on the bending position of the flexible circuit board 40 can be released by the opening 311 , thereby reducing the possibility of damage to the flexible circuit board 40 .

In some embodiments, the upper edge of the opening and the lower edge of the opening are located on the same side of the extension surface of the light-emitting surface 11a.

In some embodiments, the distance d0 from the surface of the second substrate 12 away from the light-emitting surface 11a to the light-emitting surface 11a is less than the distance d2 from the lower edge of the opening to the light-emitting surface 11a. In this case, the flexible circuit board 40 and the protruding part The squeezing force at the position corresponding to the edge of the lower surface of 12a can be released by the opening 311.

Since the protruding portion 12 a exceeds the edge of the first substrate 11 , during the transportation of the display device and the shrinkage process of the first front frame side wall 31 , the portion of the flexible circuit board 40 opposite to the side surface of the protruding portion 12 a can easily be removed. Received extrusion; in this regard, in some embodiments of the present disclosure, as shown in Figure 5, the distance d4 from the upper surface of the protruding portion 12a to the light-emitting surface 11a is greater than the distance d1 from the upper edge of the opening to the light-emitting surface 11a, The distance d4 from the lower surface of the protruding portion 12a to the light-emitting surface 11a is smaller than the distance d2 from the lower edge of the opening to the light-emitting surface 11a, so that at least a part of the side surface of the protruding portion 12a faces the opening 311, so that the flexible circuit board 40 The squeezing force on the part opposite to the side of the protruding part 12a can be released through the opening 311 as much as possible to prevent the flexible circuit board 40 from being damaged.

In some embodiments, as shown in FIG. 4 , an adhesive glue 81 is provided on the protruding portion 12 a , and the adhesive glue 81 is bonded to both the flexible circuit board 40 and the liquid crystal display panel 10 , thereby improving the connection between the flexible circuit board 40 and the liquid crystal display panel 10 . Connection stability of the liquid crystal display panel 10 .

In some embodiments, the number of openings 311 is multiple, and the orthographic projection of at least one first fixing part 91 on the extended surface of the light-emitting surface 11a is located at the orthographic projection of two adjacent openings 311 on the extended surface of the light-emitting surface 11a. between.

In some embodiments, as shown in FIGS. 7 and 8 , the openings 311 located on both sides of the same first fixing part 91 are mirror symmetrical to reduce the impact of the openings 311 on the strength uniformity of the first front frame side wall 31 . The symmetry axis of mirror symmetry is an axis perpendicular to the central axis of the first fixing part 91 and extending along the thickness direction of the liquid crystal display panel 10 .

In some embodiments, the flexible circuit board 40 includes a first edge and a second edge arranged side by side in its width direction, and a part of the orthographic projection of the first edge on a reference plane parallel to the first front frame side wall 31 is located at The opening 311 is within the orthographic projection range of the reference surface, and a part of the orthographic projection of the second edge on the reference surface is located within the orthographic projection range of the opening 311 on the reference surface, so that the edge position that is prone to line breakage can be affected. The squeezing force is used to release the stress and reduce damage to the flexible circuit board 40 .

In some embodiments, at least one end of the opening 311 exceeds the flexible circuit board 40 in the length direction of the opening 311 , and the length L0 of the exceeded portion is greater than or equal to 2 mm, thereby ensuring that the opening 311 can not be affected by the edge of the flexible circuit board 40 Squeeze force for stress relief.

In some embodiments, as shown in FIG. 7 , the orthographic projections of the first edge and the second edge of the same flexible circuit board 40 on the reference plane overlap with the orthographic projection of the same opening 311 on the reference plane.

Wherein, both ends of the opening 311 exceed the first edge and the second edge respectively, and the lengths of the portion exceeding the first edge and the portion exceeding the second edge are both greater than or equal to 2 mm.

In one example, as shown in FIG. 7 , the width W1 of the flexible circuit board 40 is between 38 mm and 42 mm, and the length L of the opening 311 is greater than or equal to 44 mm. For example, the width W1 of the flexible circuit board 40 is 40 mm, and the length L of the opening 311 is 44 mm, or 46 mm, or 48 mm.

In other embodiments, as shown in FIG. 8 , the orthographic projections of the first edge and the second edge of the same flexible circuit board 40 on the reference plane respectively overlap with the orthographic projections of different openings 311 on the reference plane. .

For example, the opening 311 that has a projection overlap with the first edge exceeds the first edge in the length direction, and the length of the excess portion is greater than or equal to 2 mm; the opening 311 that has a projection overlap with the second edge exceeds the first edge in the length direction. The second edge, and the length of the excess part is greater than or equal to 2mm.

In one example, the length L of the opening 311 is between 10 mm and 14 mm. For example, the length L of the opening 311 is 10 mm, or 11 mm, or 12 mm, or 13 mm, or 14 mm.

It should be noted that the length direction of the opening 311 is a direction perpendicular to both the thickness direction of the liquid crystal display panel 10 and the thickness direction of the first front frame side wall 31 .

In some embodiments, the diagonal length of the display area of the liquid crystal display panel 10 may be 50 to 70 inches, for example, 55 inches. The dimension d6 of the opening 311 along the thickness direction of the liquid crystal display panel 10 (that is, the width of the opening 311) is between 1.5 mm and 2 mm, so that the extrusion force on the flexible circuit board 40 can be released without affecting the front frame. Strength of. For example, d6 is 1.5mm, or 1.6mm, or 1.7mm, or 1.8mm, or 1.9mm, or 2mm.

By comparing the openings 311 of different sizes, it is found that when the opening 311 adopts a through-hole structure, in the first case, the length L of the opening 311 is 44 mm and the width is 2 mm. The orthographic projections of the first edge and the second edge on the reference plane overlap with the orthographic projection of the same opening 311 on the reference plane; in the second case, the length L of the opening 311 is 12 mm and the width is 2 mm. The orthographic projections of the first edge and the second edge of the same flexible circuit board 40 on the reference plane respectively overlap with the orthographic projections of the two openings 311 on the reference plane. In both cases, the same force is applied to the first front frame side wall 31. The results show that at the same position, the deformation amount in the first case is twice that of the case where the opening 311 is not provided. In the second case, The deformation amount is not much different from the phase change amount when the opening 311 is not provided. It can be seen that, on the premise of ensuring stress relief, the shorter the length L and width of the opening 311, the better.

In some embodiments, as shown in FIG. 5 , the distance d5 between the upper edge of the opening and the top of the first front frame side wall 31 is between 1 mm and 1.5 mm. When the distance d5 between the upper edge of the opening and the top of the first front frame side wall 31 is too small, it is not conducive to production; when the distance d5 is too large, it cannot be ensured that the distance d1 from the upper edge of the opening to the light-emitting surface 11a is smaller than the convex The distance d4 from the upper surface of the output part 12a to the light output surface 11a. In the embodiment of the present disclosure, setting d5 between 1 mm and 1.5 mm is beneficial to the production of the front frame, and can ensure that d1 is smaller than d4, so that the opening 311 can effectively suppress the extrusion force exerted on the flexible circuit board 40 freed.

For example, the distance d5 between the upper edge of the opening and the top of the first front frame side wall 31 (position T1 in FIG. 4 ) is 1 mm, or 1.1 mm, or 1.2 mm, or 1.3 mm, or 1.4 mm, or 1.5mm.

The top end of the first front frame side wall 31 is the end of the first front frame side wall 31 close to the upper edge of the opening.

In some embodiments, as shown in FIG. 4 , the opening 311 includes a through hole 311 a penetrating the first front frame side wall 31 . The through hole 311a may be in a shape such as a right rectangle, a rounded rectangle, an ellipse, etc., which is not specifically limited in this disclosure.

In another embodiment, the opening 311 may include a plurality of slits penetrating the first front frame side wall 31 , and the plurality of slits are arranged along the thickness direction of the liquid crystal display panel 10 .

In some embodiments, as shown in FIG. 6 , the opening 311 includes: a side of the first front frame side wall 31 facing the first side middle frame 21 and a side away from the first side middle frame 21 . A plurality of grooves 311b, the depth of the groove 311b is less than the thickness of the first front frame side wall 31; the plurality of grooves 311b on the same side are arranged along the thickness direction of the backlight module. FIG. 6 shows a situation where multiple grooves 311b are provided on both the side of the first front frame side wall 31 facing the first side middle frame 21 and the side away from the first side middle frame 21 . In other cases, In an example, a plurality of first front frame side walls 31 may also be provided only on the side of the first front frame side wall 31 facing the first side middle frame 21 , or only on the side of the first front frame side wall 31 away from the first side middle frame 21 . Groove 311b.

As shown in FIG. 6 , the opening 311 includes a plurality of grooves 311 b, and the first front frame side wall 31 is provided with a plurality of grooves on both the side facing the first side middle frame 21 and the side away from the first side middle frame 21 . Multiple grooves 311b. The grooves 311b on both sides of the first front frame side wall 31 are staggered in the thickness direction of the liquid crystal display panel 10 to ensure that the first front frame side wall 31 has sufficient support strength.

In some embodiments, the depth of the groove 311b is less than or equal to 70% of the thickness of the first front frame side wall 31. For example, the depth of the groove 311b is 70%, or 60% of the thickness of the first front frame side wall 31, or 50%. It should be noted that the thickness of the first front frame side wall 31 refers to the thickness of the first front frame side wall 31 at a position where the groove 311b is not provided.

In some embodiments, the distance d7 between two adjacent grooves 311b located on the same side of the first front frame side wall 31 is greater than or equal to twice the width w of the groove 311b, so that the distance d7 between the two adjacent grooves 311b on the same side of the first front frame side wall 31 When the grooves 311b are staggered on both sides of the frame, there is sufficient spacing between the grooves 311b on both sides to ensure the support strength of the first front frame side wall 31. The width w of the groove 311b may be 0.8 to 1.2 times the depth of the groove 311b.

In some embodiments, each driving side of the display device is provided with a plurality of first fixing parts 91 , thereby improving the connection stability of the first front frame side wall 31 and the first side middle frame 21 .

In some embodiments, as shown in FIGS. 7 and 8 , each driving side of the display device is provided with a plurality of flexible circuit boards 40 , and each flexible circuit board 40 is provided with a first resistor on both sides along its width direction. Fixed part 91.

In some embodiments, as shown in Figures 1 and 2, the backlight module further includes a backplane 50. The backplane 50 includes a connected backplane side wall 51 and a backplane bottom wall 52. The backplane side wall 51 and the backplane The bottom wall 52 defines a receiving space. The first side middle frame 21 is provided with a slit SL. The slit SL has an opening toward the plane of the bottom wall. A portion of the back panel side wall 51 away from the back panel bottom wall 52 is inserted into the slit SL through the opening. The first side middle frame 21 includes a first sub-middle frame 211 located between the back panel side wall 51 and the first front frame side wall 31 . The first front frame side wall 31 is connected to the first sub-middle frame through the first fixing part 91 . The middle frame 211 and the back panel side walls 51 are connected.

FIG. 9 is a cross-sectional view of the non-driving side of the display device provided in some embodiments of the present disclosure. In some embodiments, as shown in FIG. 9 , the backlight module further includes a second middle frame 22 located on the non-driving side of the display device. , each second side middle frame 22 is connected to each first side middle frame 21 to form a frame structure. In one example, the display device has a rectangular structure, one side of the display device is the driving side, and the other three sides are the non-driving sides. One first side middle frame 21 and three second side middle frames are connected to form a frame structure; in In another example, the adjacent two sides of the display device are the driving side, and the remaining two sides are the non-driving side. Two first side middle frames 21 and two second side middle frames 22 are connected to form a frame structure.

In some embodiments, as shown in Figures 1 to 4 and 9, the display module also includes: an optical film set 70, the optical film set 70 is supported on the middle frame, and the liquid crystal display panel 10 is located on the optical film set. 70 is away from the side of the bottom wall 52 of the back panel.

In one example, the optical film set 70 may include: a diffusion sheet 71 , a prism sheet 72 , etc., the diffusion sheet 71 is provided on the middle frame, and the edge area of the diffusion sheet 71 may be fixed on the middle frame through the second adhesive layer 83 ; The prism sheet 72 and other diaphragms are arranged on the side of the diffusion sheet 71 away from the back plate 50 , and the liquid crystal display panel 10 is located on the side of the prism sheet 72 away from the diffusion sheet 71 .

In one example, as shown in FIGS. 1 to 3 , the first side middle frame 21 includes: a first sub-middle frame 211 , a second sub-middle frame 212 , and a first bearing part 213 . The first sub-middle frame 211 is located at Between the backboard side wall 51 and the first front frame side wall 31, the second sub-middle frame 212 is located in the accommodation space. The first carrying portion 213 is connected to the first sub-middle frame 211 and the second sub-middle frame 212 and is located in the accommodation space. The side wall 51 of the back panel is away from the bottom wall 52 of the back panel. The second side middle frame 22 includes a connected third sub-middle frame 221 and a second bearing part 222. The third sub-middle frame 221 is located in the accommodation space, and the second bearing part 222 is located on the side wall 51 of the back panel away from the bottom wall 52 of the back panel. side. The first side middle frame 21 and the second side middle frame 22 jointly support the optical film set 70 . For example, the optical film set 70 is supported on the first carrying part 213 and the second carrying part 222 .

In some embodiments, the backlight module further includes a backlight source 90 located between the bottom wall 52 of the back panel and the optical film set 70 . For example, as shown in FIG. 9 , the backlight 90 may be a direct-type backlight, which specifically may include a driving substrate 91 and a light-emitting component 92 disposed on the driving substrate 91 , and the light-emitting component 92 may be a light-emitting diode. The direct-type backlight may also include a reflective sheet 93 disposed on the driving substrate 91. The reflective sheet 93 is used to reflect light from the light-emitting component 92 to improve light utilization. As shown in Figures 1, 2 and 9, the first sub-middle frame 212 and the third sub-middle frame 221 can also be provided with a blocking member 220. The blocking member 220 is located at the edge of the reflective sheet 93 and is in contact with the reflective sheet. 93 is in contact with the surface away from the driving substrate 91 to prevent the reflective sheet 93 from warping.

Of course, in other embodiments, the backlight 90 may also be an edge-type backlight.

In some embodiments, as shown in Figure 9, the front frame also includes a second front frame side wall 32 located on the non-driving side of the display device, and each second front frame side wall 32 is connected to each first front frame side wall 31. and surrounds the back plate 50 . The second front frame side wall 32 may be connected to the back panel side wall 51 through the second fixing part 92 . For example, the second fixing part 92 may include a screw. The screw passes through the second front frame side wall 32 and the back panel side wall 51 .

In some embodiments, as shown in FIG. 9 , the second front frame side wall 3232 has a second bending portion 32b bent toward the second side middle frame 22 , and the second fixing portion 92 is provided on the second bending portion 32b. The design of the second bent portion 32b can prevent the second fixing portion 92 from protruding from the second front frame side wall 3232, thereby improving the flatness of the entire side of the display device and reducing the frame width of the display device.

In some embodiments, as shown in FIGS. 1 , 2 and 9 , the top ends of the first front frame side wall 31 and the second front frame side wall 3232 are both bent to form a non-display area covering the liquid crystal display panel 10 The bent portions 31a and 32a. A buffer pad 82 may be provided between the bending parts 31a and 32a and the display module to prevent the front frame from colliding with the liquid crystal display panel 10 during transportation of the display device. The cushion pad 82 may be foam.

In some embodiments, as shown in FIGS. 2 and 4 , the display device may further include a first adhesive layer 80 . The first adhesive layer 80 is bonded to the liquid crystal display panel 10 and the flexible circuit board 40 , thereby improving flexibility. The circuit board 40 is fixed more firmly. The first adhesive layer 80 may be an adhesive tape.

In some embodiments, as shown in FIGS. 1 and 3 , the display device may further include a spacer layer 85 located on the driving side. The spacer layer 85 is disposed between the first front frame side wall 31 and the first side middle frame 21 . and between the first front frame side wall 31 and the liquid crystal display panel 10, and the orthographic projection of the spacer layer 85 on the first front frame side wall 31 is the same as the orthogonal projection of the flexible circuit board 40 on the first front frame side wall 31. Projections have no overlap. The arrangement of the spacer layer 85 can also prevent the flexible circuit board 40 and the liquid crystal display panel 10 from being squeezed laterally.

It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the disclosure, and these modifications and improvements are also regarded as the protection scope of the disclosure.

Claims (21)

1. The display device comprises a backlight module, a liquid crystal display panel and a front frame, wherein the liquid crystal display panel comprises a light emitting surface, and the backlight module is arranged on one side, far away from the light emitting surface, of the liquid crystal display panel in a stacked mode;

the display device further comprises a flexible circuit board positioned on the driving side, wherein at least part of the flexible circuit board is positioned between the first side middle frame and the first front frame side wall;

the first front frame side wall comprises an opening part, the opening part is closer to the light-emitting surface extending surface than the fixing part in the thickness direction of the liquid crystal display panel, and the orthographic projection of the opening part on the light-emitting surface is not overlapped with the orthographic projection of the fixing part on the light-emitting surface extending surface.

2. The display device according to claim 1, wherein an orthographic projection on a reference surface of the flexible wiring board overlaps with an orthographic projection of the opening portion on the reference surface; the reference surface is a plane parallel to the side wall of the first front frame.

3. The display device according to claim 1, wherein the flexible circuit board includes a first connection portion, a second connection portion, and a bending portion, the first connection portion is a portion of the flexible circuit board electrically connected to the liquid crystal display panel, the second connection portion is a portion located between the first side middle frame and the first front frame side wall and extending along the first front frame side wall toward a side away from the light-emitting surface, and the bending portion is connected to the first connection portion and the second connection portion, respectively;

the opening part comprises an opening part upper edge and an opening part lower edge, wherein the opening part upper edge is closer to the light-emitting surface than the opening part lower edge, the distance from the opening part upper edge to the light-emitting surface extending surface is smaller than the distance from the bending part to the light-emitting surface extending surface, and the distance from the opening part lower edge to the light-emitting surface extending surface is larger than the distance from the bending part to the light-emitting surface extending surface.

4. The display device according to claim 1, wherein the liquid crystal display panel includes a first substrate and a second substrate which are stacked, and a liquid crystal layer between the first substrate and the second substrate, the light-emitting surface being located on a side of the first substrate away from the second substrate; the second substrate protrudes from the first substrate at the driving side to form a protruding part, a binding area is arranged at one side of the protruding part facing the light-emitting surface, the flexible circuit board is electrically connected with the binding area, and is bent between the first side middle frame and the first front frame side wall and extends along the first front frame side wall to the side far away from the light-emitting surface;

the opening comprises an opening upper edge and an opening lower edge, the opening upper edge is closer to the light-emitting surface extending surface than the opening lower edge, wherein the distance from one side surface of the protruding portion towards the light-emitting surface extending surface to the light-emitting surface extending surface is larger than the distance from the opening upper edge to the light-emitting surface extending surface, and the distance from one side surface of the protruding portion towards the light-emitting surface to the light-emitting surface is smaller than the distance from the opening lower edge to the light-emitting surface extending surface.

5. The display device according to claim 1, wherein the liquid crystal display panel includes a first substrate and a second substrate which are stacked, and a liquid crystal layer between the first substrate and the second substrate, the light-emitting surface being located on a side of the first substrate away from the second substrate; the second substrate protrudes from the first substrate at the driving side to form a protruding part, a binding area is arranged at one side of the protruding part facing the light-emitting surface, the flexible circuit board is electrically connected with the binding area, and is bent between the first side middle frame and the first front frame side wall and extends along the first front frame side wall to the side far away from the light-emitting surface;

the opening part comprises an opening part upper edge and an opening part lower edge, and the orthographic projection of the opening part upper edge on a reference surface and the orthographic projection of the opening part lower edge on the reference surface are respectively positioned at two opposite sides of the orthographic projection of one side surface of the protrusion part, which faces the light-emitting surface extension surface, on the reference surface; the reference surface is a plane parallel to the side wall of the first front frame.

6. A display device according to any one of claims 3 to 5, wherein the upper edge of the opening portion and the lower edge of the opening portion are located on the same side of the light-emitting-surface extending surface.

7. The display device according to any one of claims 3 to 5, wherein a distance from a surface of the second substrate on a side away from the light-emitting surface to the light-emitting surface extension surface is smaller than a distance from the opening lower edge to the light-emitting surface extension surface.

8. The display device according to claim 1, wherein the number of the opening portions is plural, and orthographic projections of at least one of the fixing portions on the light-emitting-surface extending surface are located between orthographic projections of two adjacent opening portions on the light-emitting-surface extending surface.

9. The display device according to claim 8, wherein the openings on both sides of the same fixed portion are mirror-symmetrical.

10. The display device according to claim 1, wherein the flexible circuit board includes a first edge and a second edge arranged side by side in a width direction thereof;

a portion of the orthographic projection of the first edge on a reference plane in parallel and a portion of the orthographic projection of the second edge on the reference plane are both located within an orthographic projection range of the opening portion on the reference plane; the reference surface is a plane parallel to the side wall of the first front frame.

11. The display device according to claim 10, wherein orthographic projections of the first edge and the second edge of the same flexible circuit board on the reference plane overlap orthographic projections of the same opening portion on the reference plane; or,

orthographic projections of a first edge and a second edge of the same flexible circuit board on the reference plane overlap orthographic projections of different opening portions on the reference plane respectively.

12. The display device according to claim 10, wherein at least one end of the opening portion exceeds the flexible circuit board in a length direction of the opening portion, and a length of the excess portion is greater than or equal to 2mm.

13. The display device according to claim 1, wherein the opening includes an opening upper edge and an opening lower edge, the opening upper edge being closer to the light-emitting surface than the opening lower edge, a distance from the opening upper edge to a top end of the first front frame side wall being an end of the first front frame side wall close to the opening upper edge being between 1mm and 1.5 mm.

14. The display device according to claim 1, wherein a dimension of the opening portion in a thickness direction of the liquid crystal display panel is between 1.5mm and 2mm.

15. The display device according to any one of claims 1 to 5, 8 to 14, wherein the opening portion includes a through hole penetrating through a side wall of the first front frame;

alternatively, the opening portion may include a plurality of slits penetrating through a sidewall of the first front frame, and the plurality of slits may be arranged in a thickness direction of the liquid crystal display panel;

alternatively, the opening portion includes: a plurality of grooves provided on a side of the first front frame side wall facing the first side middle frame and/or a side remote from the first side middle frame, the grooves having a depth smaller than a thickness of the first front frame side wall; the grooves on the same side are arranged along the thickness direction of the backlight module.

16. The display device according to claim 15, wherein the opening portion includes: the grooves are arranged on one side of the first front frame side wall facing the first side middle frame and one side far away from the first side middle frame, and the grooves on two sides of the first front frame side wall are staggered in the thickness direction of the backlight module.

17. The display device according to claim 15, wherein the opening portion includes a plurality of grooves, a depth of the grooves is less than or equal to 70% of a thickness of the first front frame side wall, and a distance between two adjacent grooves located on the same side as the first front frame side wall is greater than or equal to twice a width of the grooves.

18. A display device according to any one of claims 1 to 5, 8 to 14, wherein a plurality of the flexible circuit boards are provided at each of the driving sides, and the fixing portions are provided at both sides of each of the flexible circuit boards in the width direction thereof.

19. The display device according to any one of claims 1 to 5, 8 to 14, wherein the backlight module further comprises a back plate, the back plate comprises a back plate side wall and a back plate bottom wall which are connected, the first side middle frame is provided with an insertion slot, the insertion slot is provided with an opening facing to a plane of the bottom wall, and a part of the back plate side wall away from the back plate bottom wall is inserted into the insertion slot through the opening;

the first side middle frame comprises a first sub middle frame positioned between the back plate side wall and the first front frame side wall, and the first front frame side wall is connected with the first sub middle frame and the back plate side wall through the fixing part.

20. The display device of claim 19, wherein the backlight module further comprises: the first side middle frame supports the optical film group, and the liquid crystal display panel is positioned at one side of the optical film group far away from the bottom wall of the backboard;

And the backlight source is positioned between the bottom wall of the backboard and the optical film group.

21. The display device of any one of claims 1 to 5, 8 to 14, wherein the backlight module further comprises a back plate, the front frame further comprises second front frame side walls on a non-driving side of the display device, each second front frame side wall being connected to each first front frame side wall and surrounding the back plate;

the top end of the first front frame side wall and the top end of the second front frame side wall are bent to form a bending part which at least partially covers the non-display area of the liquid crystal display panel.