Display device

Abstract

Disclose a display device, including backlight module, liquid crystal display panel and front frame, the liquid crystal display panel includes light emitting surface, the backlight module is stacked and is arranged at the side of the liquid crystal display panel away from the light emitting surface, the backlight module includes the first side middle frame in the drive side of the display device, the front frame includes the first front frame side wall in the drive side, the first front frame side wall is fixedly connected with the first side middle frame through the fixed part;The display device further includes the flexible circuit board in the drive 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 opening part, the opening part is closer to the light emitting surface compared with the fixed part in the thickness direction of the liquid crystal display panel, and, the orthographic projection of the opening part on the light emitting surface and the orthographic projection of the fixed part on the light emitting surface extension plane do not exist overlap.

Description

Technical Field

[0001] This disclosure relates to the field of display technology, and more specifically to a display device. Background Technology

[0002] 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, which provides a light source for the liquid crystal display panel. The front frame is fixedly connected to the backlight module and can fix and protect the entire display device. Summary of the Invention

[0003] This 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, and the backlight module is stacked on the side of the liquid crystal display panel away from the light-emitting surface. The backlight module includes a first side frame located on the driving side of the display device, and the front frame includes a first front frame sidewall located on the driving side. The first front frame sidewall and the first side frame are fixedly connected by a fixing part.

[0004] The display device further includes a flexible circuit board located on the driving side, at least a portion of which is located between the first side middle frame and the first front frame sidewall;

[0005] The first front frame sidewall includes an opening, which 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 orthographic projection of the opening on the light-emitting surface does not overlap with the orthographic projection of the fixing part on the light-emitting surface extension surface.

[0006] In some embodiments, the orthographic projection of the flexible circuit board reference surface overlaps with the orthographic projection of the opening on the reference surface; the reference surface is a plane parallel to the sidewall of the first front frame.

[0007] In some embodiments, the flexible circuit board includes a first connecting portion, a second connecting portion, and a bending portion connected together. The first connecting portion is a portion of 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 frame and the first front frame sidewall and extending along the first front frame sidewall toward the side away from the light-emitting surface. The bending portion is connected to the first connecting portion and the second connecting portion respectively.

[0008] The opening includes an upper edge and a lower edge. The upper edge of the opening is closer to the light-emitting surface than the lower edge of the opening. The distance from the upper edge of the opening to the extended surface of the light-emitting surface is less than the distance from the bent portion to the extended surface of the light-emitting surface, and the distance from the lower edge of the opening to the extended surface of the light-emitting surface is greater than the distance from the bent portion to the extended surface of the light-emitting surface.

[0009] In some embodiments, the liquid crystal display panel includes a first substrate and a second substrate stacked together, and a liquid crystal layer located between the first substrate and the second substrate. The light-emitting surface is located on the side of the first substrate away from the second substrate. The second substrate protrudes from the first substrate on the driving side to form a protrusion. The protrusion has a bonding area on the side facing the light-emitting surface. The flexible circuit board is electrically connected to the bonding area and is bent between the first side frame and the first front frame sidewall and extends along the first front frame sidewall away from the light-emitting surface.

[0010] The opening includes an upper edge and a lower edge. The upper edge of the opening is closer to the light-emitting surface extension surface than the lower edge of the opening. The distance from the side surface of the protrusion facing the light-emitting surface extension surface to the light-emitting surface extension surface is greater than the distance from the upper edge of the opening to the light-emitting surface extension surface. The distance from the side surface of the protrusion facing the light-emitting surface to the light-emitting surface is less than the distance from the lower edge of the opening to the light-emitting surface extension surface.

[0011] In some embodiments, the liquid crystal display panel includes a first substrate and a second substrate stacked together, and a liquid crystal layer located between the first substrate and the second substrate. The light-emitting surface is located on the side of the first substrate away from the second substrate. The second substrate protrudes from the first substrate on the driving side to form a protrusion. The protrusion has a bonding area on the side facing the light-emitting surface. The flexible circuit board is electrically connected to the bonding area and is bent between the first side frame and the first front frame sidewall and extends along the first front frame sidewall away from the light-emitting surface.

[0012] The opening includes an upper edge and a lower edge. The orthographic projection of the upper edge and the lower edge of the opening onto the reference surface are located on opposite sides of the orthographic projection of the side surface of the protrusion facing the light-emitting surface onto the reference surface. The reference surface is a plane parallel to the sidewall of the first front frame.

[0013] In some embodiments, the upper edge of the opening and the lower edge of the opening are located on the same side of the light-emitting surface extension surface.

[0014] In some embodiments, the distance from the surface of the second substrate away from the light-emitting surface to the light-emitting surface extension surface is less than the distance from the lower edge of the opening to the light-emitting surface extension surface.

[0015] In some embodiments, the number of openings is multiple, and the orthographic projection of at least one of the fixing portions on the light-emitting surface extension surface is located between the orthographic projections of two adjacent openings on the light-emitting surface extension surface.

[0016] In some embodiments, the openings located on both sides of the same fixing part are mirror-symmetrical.

[0017] In some embodiments, the flexible circuit board includes a first edge and a second edge arranged side by side in its width direction;

[0018] A portion of the orthographic projection of the first edge onto the reference plane and a portion of the orthographic projection of the second edge onto the reference plane are both located within the orthographic projection range of the opening onto the reference plane; the reference plane is a plane parallel to the first front frame sidewall.

[0019] In some embodiments, the orthographic projections of the first edge and the second edge of the same flexible circuit board on the reference plane overlap with the orthographic projection of the same opening on the reference plane; or,

[0020] The orthographic projections of the first and second edges of the same flexible circuit board on the reference plane overlap with the orthographic projections of the different openings on the reference plane.

[0021] In some embodiments, at least one end of the opening extends beyond the flexible circuit board in the length direction of the opening, and the length of the extended portion is greater than or equal to 2 mm.

[0022] In some embodiments, the opening includes an upper edge and a lower edge, the upper edge of the opening being closer to the light-emitting surface than the lower edge of the opening, the distance between the upper edge of the opening and the top end of the first front frame sidewall being between 1 mm and 1.5 mm, and the top end of the first front frame sidewall being the end of the first front frame sidewall near the upper edge of the opening.

[0023] 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.

[0024] In some embodiments, the opening includes a through hole penetrating the sidewall of the first front frame;

[0025] Alternatively, the opening may include a plurality of slits penetrating the sidewall of the first front frame, the plurality of slits being arranged along the thickness direction of the liquid crystal display panel;

[0026] Alternatively, the opening may include: a plurality of grooves disposed on the side of the first front frame sidewall facing the first side frame and / or on the side away from the first side frame, wherein the depth of the grooves is less than the thickness of the first front frame sidewall; the plurality of grooves on the same side are arranged along the thickness direction of the backlight module.

[0027] In some embodiments, the opening includes a plurality of grooves disposed on the side of the first front frame sidewall facing the first side frame and on the side away from the first side frame, wherein the grooves on both sides of the first front frame sidewall are staggered in the thickness direction of the backlight module.

[0028] In some embodiments, the opening includes a plurality of grooves, the depth of which is less than or equal to 70% of the thickness of the first front frame sidewall, and the spacing between two adjacent grooves on the same side of the first front frame sidewall is greater than or equal to twice the width of the groove.

[0029] In some embodiments, a plurality of flexible circuit boards are provided on each of the driving sides, and each of the flexible circuit boards is provided with a fixing portion on both sides along its width direction.

[0030] In some embodiments, the backlight module further includes a back plate, the back plate including a connected back plate sidewall and a back plate bottom wall, a slot is provided on the first side frame, the slot having an opening toward the plane of the bottom wall, and a portion of the back plate sidewall away from the back plate bottom wall is inserted into the slot through the opening;

[0031] The first side frame includes a first sub-frame located between the back panel sidewall and the first front frame sidewall, and the first front frame sidewall is connected to the first sub-frame and the back panel sidewall through the fixing part.

[0032] In some embodiments, the backlight module further includes: an optical film group, the first side frame supporting the optical film group, and the liquid crystal display panel located on the side of the optical film group away from the bottom wall of the back plate;

[0033] The backlight is located between the bottom wall of the back plate and the optical film assembly.

[0034] In some embodiments, the backlight module further includes a back plate, and the front frame further includes a second front frame sidewall located on the non-driving side of the display device, wherein each of the second front frame sidewalls is connected to each of the first front frame sidewalls and surrounds the back plate;

[0035] The top ends of the first front frame sidewall and the second front frame sidewall are both bent to form a bent portion that at least partially covers the non-display area of ​​the liquid crystal display panel. Attached Figure Description

[0036] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0037] Figure 1 This is a cross-sectional view of the display device driver side provided in some embodiments of this disclosure.

[0038] Figure 2 for Figure 1 A magnified view of region A in the middle.

[0039] Figure 3 This is another cross-sectional view of the display device driver side provided in some embodiments of this disclosure.

[0040] Figure 4 for Figure 3 A magnified view of region B in the middle.

[0041] Figure 5 for Figure 4 A schematic diagram of the dimension markings in the diagram.

[0042] Figure 6 This is another cross-sectional view of the display device driver side provided in some embodiments of this disclosure.

[0043] Figure 7 This is a side view of a first front frame sidewall provided in some embodiments of this disclosure.

[0044] Figure 8 Another side view of the first front frame provided in some embodiments of this disclosure.

[0045] Figure 9 This is a cross-sectional view of the non-driving side of a display device provided in some embodiments of this disclosure. Detailed Implementation

[0046] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0048] Unless otherwise defined, the technical or scientific terms used in the embodiments of this disclosure should have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0049] As used herein, “parallel” and “perpendicular” include the described situation and situations that are similar to the described situation, within an acceptable range of deviation, which is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, “parallel” includes absolute parallelism and approximate parallelism, where an acceptable range of deviation for approximate parallelism may be, for example, within 10°; “perpendicular” includes absolute perpendicularity and approximate perpendicularity, where an acceptable range of deviation for approximate perpendicularity may also be, for example, within 10°.

[0050] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.

[0051] This document describes exemplary embodiments with reference to sectional views and / or plan views, which are idealized exemplary drawings. In the drawings, the thickness of layers and regions is enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Therefore, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations due to, for example, manufacturing processes. Thus, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the regions of the device, nor are they intended to limit the scope of the exemplary embodiments.

[0052] It should be noted that the description of the numerical range "m1~m2" in the embodiments of this disclosure includes the endpoint values ​​m1 and m2.

[0053] Figure 1This is a cross-sectional view of the display device driver side provided in some embodiments of this disclosure. Figure 2 for Figure 1 Enlarged view of region A in the middle. Figure 3 This is another cross-sectional view of the display device driver side provided in some embodiments of this disclosure. Figure 4 for Figure 3 Enlarged view of region B in the middle. Figure 5 for Figure 4 The diagram shows the dimension markings in the diagram. Figure 6 This is another cross-sectional view of the display device driver side provided in some embodiments of this disclosure. Figure 7 This is a side view of the first front frame sidewall provided in some embodiments of this disclosure. Figure 8 This is another side view of the first front frame provided in some embodiments of this disclosure. Figure 1 The sectional view shown corresponds to Figure 7 The position of line A-A' in the middle, Figure 3 The sectional view shown corresponds to Figure 7 The position of the B-B' line.

[0054] like Figures 1 to 4 As shown, 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 surface of the liquid crystal display panel 10 facing the user during use. 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 frame 21 located on the driving side of the display device; the front frame includes a first front frame sidewall 31 located on the driving side, and the first front frame sidewall 31 is fixedly connected to the first side frame 21 by a first fixing part 91.

[0055] In this context, the driving side of the display device refers to the side used to connect to the driving circuit board 60. In some embodiments, the display device may have one or more driving sides. For example, the display device may have a rectangular structure, with one side being the driving side, or both adjacent sides being driving sides.

[0056] The display device may include a mid-frame, with the first side mid-frame 21 being the portion of the mid-frame located on the driving side; and the first front frame sidewall 31 being the portion of the front frame located on the driving side.

[0057] like Figures 2 to 4 As shown, the display device also includes a flexible circuit board 40 located on the driving side, at least partially situated between the first side frame 21 and the first front frame sidewall 31. The flexible circuit board 40 connects the liquid crystal display panel 10 and the driving circuit board 40, thereby providing driving signals from the driving circuit board 40 to the liquid crystal display panel 10 to drive it to display.

[0058] In one example, the first fastener 91 can be a fastening screw.

[0059] like Figures 1 to 2 As shown, during the testing or use of the display device, the first side frame 21 undergoes significant thermal expansion and thermal contraction. When the first front frame sidewall 31 is fixed to the first side frame 21, the deformation of the frame will pull on the front frame, causing displacement or deformation. When the displacement or deformation of the front frame reaches a certain level, it will compress the flexible circuit board 40, damaging it and affecting the display image of the liquid crystal display panel.

[0060] To address the issue of front frame deformation causing compression of the flexible circuit board 40, in this embodiment of the disclosure, such as... Figure 2 , Figures 4 to 6 As shown, an opening 311 is provided on the first front frame sidewall 31. The opening 311 is closer to the light-emitting surface 11a in the thickness direction of the liquid crystal display panel 10 than the first fixing part 91. Furthermore, the orthographic projection of the opening 311 on the extension surface of the light-emitting surface 11a does not overlap with the orthographic projection of the first fixing part 91 on the extension surface of the light-emitting surface 11a.

[0061] The opening 311 can be a structure that penetrates the first front frame sidewall 31 along the thickness direction of the first front frame sidewall 31, or it can be a structure that does not completely penetrate the first front frame sidewall 31.

[0062] It should be noted that when the light-emitting surface 11a is a plane, the extended surface of the light-emitting surface 11a is the extended plane of the light-emitting surface 11a; when the light-emitting surface 11a is a curved surface, the extended surface of the light-emitting surface 11a is the extended surface of the curved surface.

[0063] In this embodiment, the first front frame sidewall 31 includes an opening 311. When the first front frame sidewall 31 contracts, the lateral pressure exerted on the flexible circuit board 40 is released through the opening 311, thereby reducing the pressure exerted on the flexible circuit board 40 by the first front frame sidewall 31, thus reducing the possibility of damage to the flexible circuit board 40 and improving the display effect of the display device.

[0064] Furthermore, to avoid the first fixing part 91 affecting the setting of the flexible circuit board 40, the orthographic projection of the flexible circuit board 40 on the extension surface of the light-emitting surface 11a does not overlap with the orthographic projection of the first fixing part 91 on the extension surface of the light-emitting surface 11a. In this embodiment, the orthographic projection of the opening 311 on the extension surface of the light-emitting surface 11a does not overlap with the orthographic projection of the first fixing part 91 on the extension surface of the light-emitting surface 11a. That is, the position of the opening 311 is adapted to the position of the flexible circuit board 40, so that the opening 311 can effectively release the lateral extrusion force while preventing the opening 311 from being too large and affecting the support strength of the first front frame sidewall 31.

[0065] In some embodiments, the material of the first side frame 21 may be an organic material such as resin.

[0066] In some embodiments, such as Figure 3 As shown, a first mounting hole V1 is provided on the first front frame sidewall 31, and a first fixing part 91 passes through the first mounting hole V1. For example, a second mounting hole V2 is provided on the first side middle frame 21, 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 plate 50; the first fixing part 91 may include a screw. In one example, the diameter of the first mounting hole V1 can be between 3.5mm and 4.5mm. For example, the diameter of the first mounting hole V1 is 4mm.

[0067] In some embodiments, such as Figure 3 As shown, the first front frame sidewall 31 has a first curved portion 31b that bends toward the first side frame 21, and a first mounting hole V1 is disposed on the first curved portion 31b. The design of the first curved portion 31b can prevent the fixing portion from protruding from the first front frame sidewall 31, thereby improving the flatness of the overall side of the display device and reducing the bezel width of the display device.

[0068] In some embodiments, such as Figure 7 and Figure 8 As shown, the closest distance C0 between the center of the first mounting hole V1 and the opening 311 along the length of the first front frame sidewall 31 is between 6mm and 8mm. This allows the opening 311 to release the lateral compressive force while preventing it from being too large and affecting the support strength of the first front frame sidewall 31. For example, the diameter of the first mounting hole V1 is 4mm, and the closest distance between the first mounting hole V1 and the opening 311 along the length of the first front frame sidewall 31 is 6mm, 7mm, or 8mm.

[0069] The length direction of the first front frame sidewall 31 refers to the direction that is perpendicular to both the height direction of the liquid crystal display panel 10 and the thickness direction of the first front frame sidewall 31.

[0070] 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 squeezing force of the first front frame sidewall 31 on the flexible circuit board 40.

[0071] In some embodiments, such as Figure 4As shown, the flexible circuit board 40 includes a first connecting portion 41, a second connecting portion 42, and a bending portion 43 connected together. The first connecting portion 41 is the part of the flexible circuit board 40 that is electrically connected to the liquid crystal display panel 10. The second connecting portion 42 is the part located between the first side frame 21 and the first front frame side wall 31 and extends along the first front frame side wall 31 away from the light-emitting surface 11a. The bending portion 43 is connected to the first connecting portion 41 and the second connecting portion 42 respectively.

[0072] The liquid crystal display panel 10 includes a display area and a non-display area. The non-display area includes a pad area, in which pads are provided. 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 pads of the liquid crystal display panel 10 are bonded together. The boundary line between the first connecting part 41 and the bending part 43 is the position on the flexible circuit board 40 corresponding to the boundary of the bonding area away from the display area of ​​the liquid crystal display panel 10.

[0073] It should be noted that the phrase "extending along the first front frame sidewall 31 toward the side away from the light-emitting surface 11a" for the second connecting portion 42 means that the overall extension trend of the second connecting portion 42 is toward the side away from the light-emitting surface 11a, and does not mean that the second connecting portion 42 is necessarily planar. For example, a protrusion 40v can be formed in the portion of the flexible circuit board 40 that extends along the first front frame sidewall 31 toward the side away from the light-emitting surface 11a. The provision of the protrusion 40v can prevent the flexible circuit board 40 from breaking under stress.

[0074] In some embodiments, such as Figure 2 , Figure 4 and Figure 5 As shown, the opening 311 includes an upper edge and a lower edge. The upper edge of the opening is closer to the light-emitting surface 11a than the lower edge of the opening. The distance d1 from the upper edge of the opening to the extended surface of the light-emitting surface 11a is less than the distance d3 from the bent portion 43 to the extended surface of the light-emitting surface 11a, and 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 d3 from the bent portion 43 to the extended surface of the light-emitting surface 11a.

[0075] It should be noted that the upper edge of the opening refers to the upper edge of the overall 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 overall structure of the opening 311 in the thickness direction of the liquid crystal display panel 10. For example, if the opening 311 includes a through hole, then the upper edge of the opening is the upper edge of the through hole as a whole; the lower edge of the opening is the lower edge of the through hole as a whole. As another example, if the opening 311 includes multiple slits arranged in the thickness direction of the liquid crystal display panel 10, then the upper edge of the opening is the upper edge of the overall structure composed of the multiple slits; the lower edge of the opening is the lower edge of the overall structure composed of the multiple slits.

[0076] It should also be noted that, in the embodiments disclosed herein, the distance from a certain structure to the light-emitting surface 11a refers to the distance between the structure and the light-emitting surface 11a in the thickness direction of the liquid crystal display panel 10.

[0077] Compared to other locations, the bent portion 43 of the flexible circuit board 40 is more susceptible to damage when subjected to pressure. Therefore, when the distance d1 from the upper edge of the opening to the light-emitting surface 11a is less than the distance d3 from the bent portion 43 to the light-emitting surface 11a, and the distance d2 from the lower edge of the opening to the light-emitting surface 11a is greater than the distance d3 from the bent portion 43 to the light-emitting surface 11a, it is beneficial to release the stress on the bent portion 43 and reduce the possibility of damage to the flexible circuit board 40.

[0078] In some embodiments, such as Figure 4 As shown, the liquid crystal display panel 10 includes a first substrate 11 and a second substrate 12 stacked together, and a liquid crystal layer (not shown) located between the first substrate 11 and the second substrate 12. The light-emitting surface 11a 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 protrusion 12a, and has a bonding area on the side of the protrusion 12a facing the light-emitting surface 11a. The flexible circuit board 40 is electrically connected to the bonding area and is bent between the first side frame 21 and the first front frame sidewall 31 and extends along the first front frame sidewall 31 away from the light-emitting surface 11a.

[0079] The opening 311 includes an upper edge and a lower edge, with the upper edge being closer to the light-emitting surface 11a than the lower edge. Specifically, the distance d4 from the surface of the protrusion 12a facing the light-emitting surface 11a (i.e., the upper surface of the protrusion 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, and the distance d4 from the upper surface of the protrusion 12a 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 compressive force on the flexible circuit board 40 at the position corresponding to the edge of the upper surface of the protrusion 12a can be released by the opening 311.

[0080] In some embodiments, the opening includes an upper edge and a lower edge, wherein, in the case where the backlight module includes a backplate 50, the lower edge of the opening is closer to the bottom wall 52 of the backplate 50 than the upper edge of the opening.

[0081] The orthographic projections of the upper edge of the opening and the lower edge of the opening onto the reference plane are located on opposite sides of the orthographic projections of the upper surface of the protrusion 12a onto the reference plane; wherein the reference plane is a plane parallel to the first front frame sidewall 31. In this case, the stress on the bending position of the flexible circuit board 40 can be released by the opening 311, reducing the possibility of damage to the flexible circuit board 40.

[0082] 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.

[0083] 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 compressive force on the flexible circuit board 40 at the position corresponding to the edge of the lower surface of the protrusion 12a can be released by the opening 311.

[0084] Because the protrusion 12a extends beyond the edge of the first substrate 11, the portion of the flexible circuit board 40 opposite the side of the protrusion 12a is easily compressed during the handling of the display device and during the retraction of the first front frame sidewall 31. In some embodiments of this disclosure, such as... Figure 5 As shown, the distance d4 from the upper surface of the protrusion 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, and the distance d4 from the lower surface of the protrusion 12a 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, so that at least a portion of the side of the protrusion 12a is directly opposite the opening 311, thereby allowing the compressive force on the portion of the flexible circuit board 40 opposite to the side of the protrusion 12a to be released as much as possible through the opening 311, preventing damage to the flexible circuit board 40.

[0085] In some embodiments, such as Figure 4 As shown, adhesive 81 is provided on the protrusion 12a, which is bonded to both the flexible circuit board 40 and the liquid crystal display panel 10, thereby improving the connection stability between the flexible circuit board 40 and the liquid crystal display panel 10.

[0086] In some embodiments, the number of openings 311 is multiple, and the orthographic projection of at least one first fixing part 91 on the extension surface of the light-emitting surface 11a is located between the orthographic projections of two adjacent openings 311 on the extension surface of the light-emitting surface 11a.

[0087] In some embodiments, such as Figure 7 and Figure 8 As shown, 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 sidewall 31. The axis of symmetry of the 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.

[0088] In some embodiments, the flexible circuit board 40 includes a first edge and a second edge arranged side by side in its width direction. A portion of the orthographic projection of the first edge onto a reference plane parallel to the first front frame sidewall 31 is located within the orthographic projection range of the opening 311 onto the reference plane. A portion of the orthographic projection of the second edge onto the reference plane is located within the orthographic projection range of the opening 311 onto the reference plane. This allows for stress relief of the extrusion force on edge locations prone to circuit breakage, reducing the likelihood of damage to the flexible circuit board 40.

[0089] In some embodiments, at least one end of the opening 311 extends beyond the flexible circuit board 40 in the length direction of the opening 311, and the length L0 of the extended portion is greater than or equal to 2 mm, thereby ensuring that the opening 311 can relieve the stress of the extrusion force on the edge of the flexible circuit board 40.

[0090] In some embodiments, such as Figure 7 As shown, the orthographic projections of the first and second edges of the same flexible circuit board 40 onto the reference plane overlap with the orthographic projections of the same opening 311 onto the reference plane.

[0091] The two ends of the opening 311 extend beyond the first edge and the second edge, respectively, and the lengths of the portions extending beyond the first edge and the portions extending beyond the second edge are both greater than or equal to 2 mm.

[0092] In one example, such as Figure 7 As shown, the width W1 of the flexible circuit board 40 is between 38mm and 42mm, and the length L of the opening 311 is greater than or equal to 44mm. For example, the width W1 of the flexible circuit board 40 is 40mm, and the length L of the opening 311 is 44mm, 46mm, or 48mm.

[0093] In other embodiments, such as Figure 8 As shown, the orthographic projections of the first and second edges of the same flexible circuit board 40 onto the reference plane overlap with the orthographic projections of different openings 311 onto the reference plane.

[0094] For example, the opening 311 that overlaps with the first edge in projection extends beyond the first edge in the length direction, and the length of the extended portion is greater than or equal to 2 mm; the opening 311 that overlaps with the second edge in projection extends beyond the second edge in the length direction, and the length of the extended portion is greater than or equal to 2 mm.

[0095] 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.

[0096] It should be noted that the length direction of the opening 311 is perpendicular to both the thickness direction of the liquid crystal display panel 10 and the thickness direction of the first front frame sidewall 31.

[0097] In some embodiments, the diagonal length of the display area of ​​the liquid crystal display panel 10 can 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 (i.e., the width of the opening 311) is between 1.5 mm and 2 mm, thereby relieving the compressive pressure on the flexible circuit board 40 without affecting the strength of the front frame. For example, d6 is 1.5 mm, or 1.6 mm, or 1.7 mm, or 1.8 mm, or 1.9 mm, or 2 mm.

[0098] By comparing openings 311 of different sizes, it was found that when the opening 311 adopts a through-hole structure, in the first case, the length L of the opening 311 is 44mm and the width is 2mm. The orthographic projections of the first and second edges of the same flexible circuit board 40 on the reference plane overlap with the orthographic projections of the same opening 311 on the reference plane. In the second case, the length L of the opening 311 is 12mm and the width is 2mm. The orthographic projections of the first and second edges of the same flexible circuit board 40 on the reference plane overlap with the orthographic projections of the two openings 311 on the reference plane, respectively. Applying the same force to the first front frame sidewall 31 in both cases, the results show that at the same location, the deformation in the first case is twice that without the opening 311, while the deformation in the second case is not significantly different from that without the opening 311. Therefore, under the premise of ensuring stress relief, the smaller the length L and width of the opening 311, the better.

[0099] In some embodiments, such as Figure 5 As shown, the distance d5 between the upper edge of the opening and the top of the first front frame sidewall 31 is between 1mm and 1.5mm. When the distance d5 between the upper edge of the opening and the top of the first front frame sidewall 31 is too small, it is not conducive to manufacturing; when the distance d5 is too large, it cannot be guaranteed that the distance d1 between the upper edge of the opening and the light-emitting surface 11a is less than the distance d4 between the upper surface of the protrusion 12a and the light-emitting surface 11a. In this embodiment, setting d5 between 1mm and 1.5mm is beneficial to the manufacturing of the front frame and can ensure that d1 is less than d4, thereby effectively releasing the compressive force on the flexible circuit board 40 from the opening 311.

[0100] For example, the upper edge of the opening extends to the top of the first front frame sidewall 31 (e.g.) Figure 4 The distance d5 between the T1 position in the image is 1mm, or 1.1mm, or 1.2mm, or 1.3mm, or 1.4mm, or 1.5mm.

[0101] The top end of the first front frame sidewall 31 is the end of the first front frame sidewall 31 near the upper edge of the opening.

[0102] In some embodiments, such as Figure 4 As shown, the opening 311 includes a through hole 311a that penetrates the side wall 31 of the first front frame. The through hole 311a can be a right-angled rectangle, a rounded rectangle, an ellipse, or other shapes, and this disclosure does not impose any specific limitations.

[0103] In another embodiment, the opening 311 may include a plurality of slits penetrating the first front frame sidewall 31, the plurality of slits being arranged along the thickness direction of the liquid crystal display panel 10.

[0104] In some other embodiments, such as Figure 6 As shown, the opening 311 includes a plurality of grooves 311b disposed on the side of the first front frame sidewall 31 facing the first side frame 21 and on the side away from the first side frame 21, the depth of the grooves 311b being less than the thickness of the first front frame sidewall 31; the plurality of grooves 311b on the same side are arranged along the thickness direction of the backlight module. Figure 6 The illustration shows a case where multiple grooves 311b are provided on both the side of the first front frame sidewall 31 facing the first side frame 21 and the side away from the first side frame 21. In other examples, multiple grooves 311b may be provided only on the side of the first front frame sidewall 31 facing the first side frame 21, or only on the side of the first front frame sidewall 31 away from the first side frame 21.

[0105] like Figure 6 As shown, the opening 311 includes multiple grooves 311b, and multiple grooves 311b are provided on both the side of the first front frame sidewall 31 facing the first side frame 21 and the side away from the first side frame 21. The grooves 311b on both sides of the first front frame sidewall 31 are staggered in the thickness direction of the liquid crystal display panel 10 to ensure that the first front frame sidewall 31 has sufficient support strength.

[0106] In some embodiments, the depth of the groove 311b is less than or equal to 70% of the thickness of the first front frame sidewall 31. For example, the depth of the groove 311b is 70%, 60%, or 50% of the thickness of the first front frame sidewall 31. It should be noted that the thickness of the first front frame sidewall 31 refers to the thickness of the first front frame sidewall 31 in the position where the groove 311b is not provided.

[0107] In some embodiments, the distance d7 between two adjacent grooves 311b on the same side of the first front frame sidewall 31 is greater than or equal to twice the width w of the groove 311b. This ensures sufficient spacing between the grooves 311b on both sides of the first front frame sidewall 31 when the grooves 311b are staggered on both sides, guaranteeing the support strength of the first front frame sidewall 31. The width w of the groove 311b can be 0.8 to 1.2 times the depth of the groove 311b.

[0108] 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 between the first front frame sidewall 31 and the first side middle frame 21.

[0109] In some embodiments, such as Figure 7 and Figure 8 As shown, 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 fixing part 91 on both sides along its width direction.

[0110] In some embodiments, such as Figure 1 and Figure 2 As shown, the backlight module also includes a backplate 50, which includes a connected backplate sidewall 51 and a backplate bottom wall 52, defining an accommodating space. A slot SL is provided on the first side frame 21, with an opening facing the plane of the bottom wall. A portion of the backplate sidewall 51, away from the backplate bottom wall 52, is inserted into the slot SL through the opening. The first side frame 21 includes a first sub-frame 211 located between the backplate sidewall 51 and the first front frame sidewall 31. The first front frame sidewall 31 is connected to the first sub-frame 211 and the backplate sidewall 51 via a first fixing part 91.

[0111] Figure 9 This is a cross-sectional view of the non-driving side of a display device provided in some embodiments of this disclosure. In some embodiments, such as... Figure 9 As shown, the backlight module also includes a second side frame 22 located on the non-driving side of the display device, and each second side frame 22 is connected to each first side frame 21 to form a frame structure. In one example, the display device has a rectangular structure, with one side being the driving side and the other three sides being the non-driving side, and one first side frame 21 and three second side frames are connected to form a frame structure; in another example, the adjacent two sides of the display device are the driving side, and the other two sides are the non-driving side, and two first side frames 21 and two second side frames 22 are connected to form a frame structure.

[0112] In some embodiments, such as Figures 1 to 4 , Figure 9As shown, the display module also includes an optical film group 70, which is supported on the middle frame, and the liquid crystal display panel 10 is located on the side of the optical film group 70 away from the bottom wall 52 of the back plate.

[0113] In one example, the optical film group 70 may include: a diffuser 71, a prism sheet 72, etc. The diffuser 71 is disposed on the middle frame, and the edge area of ​​the diffuser 71 can be fixed to the middle frame by the second adhesive layer 83; the prism sheet 72 and other films are disposed on the side of the diffuser 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 diffuser 71.

[0114] In one example, such as Figures 1 to 3 As shown, the first side frame 21 includes a first sub-frame 211, a second sub-frame 212, and a first support portion 213. The first sub-frame 211 is located between the back panel sidewall 51 and the first front frame sidewall 31. The second sub-frame 212 is located in the receiving space. The first support portion 213 is connected to the first sub-frame 211 and the second sub-frame 212 and is located on the side of the back panel sidewall 51 away from the back panel bottom wall 52. The second side frame 22 includes a connected third sub-frame 221 and a second support portion 222. The third sub-frame 221 is located in the receiving space, and the second support portion 222 is located on the side of the back panel sidewall 51 away from the back panel bottom wall 52. The first side frame 21 and the second side frame 22 together support the optical film assembly 70. For example, the optical film assembly 70 is supported on the first support portion 213 and the second support portion 222.

[0115] In some embodiments, the backlight module further includes a backlight source 90 located between the bottom wall 52 of the backplate and the optical film assembly 70. For example, as Figure 9 As shown, the backlight 90 can be a direct-lit backlight, which specifically includes a driving substrate 91 and a light-emitting element 92 disposed on the driving substrate 91. The light-emitting element 92 can be a light-emitting diode (LED). The direct-lit backlight may also include a reflective sheet 93 disposed on the driving substrate 91, which is used to reflect the light from the light-emitting element 92, thereby improving light utilization. Figure 1 , Figure 2 and Figure 9 As shown, a shielding member 220 may also be provided on the first sub-frame 212 and the third sub-frame 221. The shielding member 220 is located at the edge of the reflective sheet 93 and contacts the surface of the reflective sheet 93 away from the driving substrate 91 to prevent the reflective sheet 93 from warping.

[0116] Of course, in other embodiments, the backlight 90 may also be a side-lit backlight.

[0117] In some embodiments, such as Figure 9As shown, the front frame also includes a second front frame sidewall 32 located on the non-driving side of the display device. Each second front frame sidewall 32 is connected to each first front frame sidewall 31 and surrounds the back panel 50. The second front frame sidewall 32 can be connected to the back panel sidewall 51 via a second fixing part 92. For example, the second fixing part 92 may include a screw. The screw passes through both the second front frame sidewall 32 and the back panel sidewall 51.

[0118] In some embodiments, such as Figure 9 As shown, the second front frame sidewall 3232 has a second curved portion 32b that bends toward the second side frame 22, and the second fixing portion 92 is disposed on the second curved portion 32b. The design of the second curved portion 32b can prevent the second fixing portion 92 from protruding from the second front frame sidewall 3232, thereby improving the flatness of the overall side of the display device and reducing the bezel width of the display device.

[0119] In some embodiments, such as Figure 1 , Figure 2 and Figure 9 As shown, the top ends of the first front frame sidewall 31 and the second front frame sidewall 32 are both bent to form bent portions 31a and 32a that cover the non-display area of ​​the liquid crystal display panel 10. A buffer pad 82 can be provided between the bent portions 31a and 32a and the display module to prevent the front frame from bumping or knocking the liquid crystal display panel 10 during transport. The buffer pad 82 can be foam.

[0120] In some embodiments, such as Figure 2 and Figure 4 As shown, the display device may further include a first adhesive layer 80, which is bonded to the liquid crystal display panel 10 and the flexible circuit board 40, thereby improving the firmness of the flexible circuit board 40. The first adhesive layer 80 may be adhesive tape.

[0121] In some embodiments, such as Figure 1 and Figure 3 As shown, 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 sidewall 31 and the first side middle frame 21, and between the first front frame sidewall 31 and the liquid crystal display panel 10. The orthographic projection of the spacer layer 85 on the first front frame sidewall 31 does not overlap with the orthographic projection of the flexible circuit board 40 on the first front frame sidewall 31. The spacer layer 85 also prevents the flexible circuit board 40 and the liquid crystal display panel 10 from being subjected to lateral compression.

[0122] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display device comprising a backlight module, a liquid crystal display panel, and a front frame, wherein the liquid crystal display panel includes a light-emitting surface, and the backlight module is stacked on the side of the liquid crystal display panel away from the light-emitting surface, characterized in that, The backlight module includes a first side frame located on the driving side of the display device, and the front frame includes a first front frame sidewall located on the driving side. The first front frame sidewall is fixedly connected to the first side frame via a fixing part. The display device further includes a flexible circuit board located on the driving side, at least a portion of which is located between the first side middle frame and the first front frame sidewall; The first front frame sidewall includes an opening, which 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 orthographic projection of the opening on the light-emitting surface does not overlap with the orthographic projection of the fixing part on the light-emitting surface extension surface; the opening includes an upper edge and a lower edge, which are closer to the light-emitting surface extension surface than the lower edge. The flexible circuit board includes a first connecting portion, a second connecting portion, and a bending portion connected together. The first connecting portion is the part of the flexible circuit board that is electrically connected to the liquid crystal display panel. The second connecting portion is the part located between the first side frame and the first front frame sidewall and extending along the first front frame sidewall away from the light-emitting surface. The bending portion is connected to the first connecting portion and the second connecting portion respectively. The distance from the upper edge of the opening to the light-emitting surface extension surface is less than the distance from the bending portion to the light-emitting surface extension surface, and the distance from the lower edge of the opening to the light-emitting surface extension surface is greater than the distance from the bending portion to the light-emitting surface extension surface. And / or, the liquid crystal display panel includes a first substrate and a second substrate stacked together, and a liquid crystal layer located between the first substrate and the second substrate, wherein the light-emitting surface is located on the side of the first substrate away from the second substrate; the second substrate protrudes from the first substrate on the driving side to form a protrusion, and has a bonding area on the side of the protrusion facing the light-emitting surface, the flexible circuit board is electrically connected to the bonding area, and is bent between the first side frame and the first front frame sidewall and extends along the first front frame sidewall away from the light-emitting surface; the distance from the side surface of the protrusion facing the light-emitting surface extension surface to the light-emitting surface extension surface is greater than the distance from the upper edge of the opening to the light-emitting surface extension surface, and the distance from the side surface of the protrusion facing the light-emitting surface to the light-emitting surface is less than the distance from the lower edge of the opening to the light-emitting surface extension surface.

2. The display device according to claim 1, characterized in that, The orthographic projection of the flexible circuit board on the reference surface overlaps with the orthographic projection of the opening on the reference surface; the reference surface is a plane parallel to the sidewall of the first front frame.

3. The display device according to claim 1, characterized in that, The orthographic projection of the upper edge of the opening onto the reference surface and the orthographic projection of the lower edge of the opening onto the reference surface are respectively located on opposite sides of the orthographic projection of the side surface of the protrusion facing the light-emitting surface extension surface onto the reference surface; the reference surface is a plane parallel to the first front frame sidewall.

4. The display device according to any one of claims 1 to 3, characterized in that, The upper edge and the lower edge of the opening are located on the same side of the light-emitting surface extension surface.

5. The display device according to any one of claims 1 to 3, characterized in that, The distance from the surface of the second substrate away from the light-emitting surface to the extended surface of the light-emitting surface is less than the distance from the lower edge of the opening to the extended surface of the light-emitting surface.

6. The display device according to claim 1, characterized in that, The number of openings is multiple, and the orthographic projection of at least one of the fixing parts on the light-emitting surface extension surface is located between the orthographic projections of two adjacent openings on the light-emitting surface extension surface.

7. The display device according to claim 6, characterized in that, The openings located on both sides of the same fixing part are mirror-symmetrical.

8. The display device according to claim 1, characterized in that, The flexible circuit board includes a first edge and a second edge arranged side by side in its width direction; A portion of the orthographic projection of the first edge onto the reference plane and a portion of the orthographic projection of the second edge onto the reference plane are both located within the orthographic projection range of the opening onto the reference plane; the reference plane is a plane parallel to the first front frame sidewall.

9. The display device according to claim 8, characterized in that, The orthographic projections of the first and second edges of the same flexible circuit board on the reference plane overlap with the orthographic projections of the same opening on the reference plane; or, The orthographic projections of the first and second edges of the same flexible circuit board on the reference plane overlap with the orthographic projections of the different openings on the reference plane.

10. The display device according to claim 8, characterized in that, At least one end of the opening extends beyond the flexible circuit board in the length direction of the opening, and the length of the extended portion is greater than or equal to 2 mm.

11. The display device according to claim 1, characterized in that, The distance between the upper edge of the opening and the top of the first front frame sidewall is between 1 mm and 1.5 mm, and the top of the first front frame sidewall is the end of the first front frame sidewall near the upper edge of the opening.

12. The display device according to claim 1, characterized in that, The size of the opening along the thickness direction of the liquid crystal display panel is between 1.5mm and 2mm.

13. The display device according to any one of claims 1 to 3, 6 to 12, characterized in that, The opening includes a through hole penetrating the side wall of the first front frame; Alternatively, the opening may include a plurality of slits penetrating the sidewall of the first front frame, the plurality of slits being arranged along the thickness direction of the liquid crystal display panel; Alternatively, the opening may include: a plurality of grooves disposed on the side of the first front frame sidewall facing the first side frame and / or on the side away from the first side frame, wherein the depth of the grooves is less than the thickness of the first front frame sidewall; the plurality of grooves on the same side are arranged along the thickness direction of the backlight module.

14. The display device according to claim 13, characterized in that, The opening includes a plurality of grooves on the side of the first front frame sidewall facing the first side frame and on the side away from the first side frame, wherein the grooves on both sides of the first front frame sidewall are staggered in the thickness direction of the backlight module.

15. The display device according to claim 13, characterized in that, The opening includes multiple grooves, the depth of which is less than or equal to 70% of the thickness of the first front frame sidewall, and the distance between two adjacent grooves on the same side of the first front frame sidewall is greater than or equal to twice the width of the groove.

16. The display device according to any one of claims 1 to 3, 6 to 12, characterized in that, Multiple flexible circuit boards are provided on each of the driving sides, and each flexible circuit board has a fixing part on both sides along its width direction.

17. The display device according to any one of claims 1 to 3, 6 to 12, characterized in that, The backlight module also includes a back plate, which includes a connected back plate side wall and a back plate bottom wall. A slot is provided on the first side frame, and the slot has an opening facing the plane of the bottom wall. A portion of the back plate side wall away from the back plate bottom wall is inserted into the slot through the opening. The first side frame includes a first sub-frame located between the back panel sidewall and the first front frame sidewall, and the first front frame sidewall is connected to the first sub-frame and the back panel sidewall through the fixing part.

18. The display device according to claim 17, characterized in that, The backlight module further includes: an optical film group, the first side frame supporting the optical film group, and the liquid crystal display panel located on the side of the optical film group away from the bottom wall of the back plate; The backlight is located between the bottom wall of the back plate and the optical film assembly.

19. The display device according to any one of claims 1 to 3, 6 to 12, characterized in that, The backlight module further includes a back plate, and the front frame further includes a second front frame sidewall located on the non-driving side of the display device. Each of the second front frame sidewalls is connected to each of the first front frame sidewalls and surrounds the back plate. The top ends of the first front frame sidewall and the second front frame sidewall are both bent to form a bent portion that at least partially covers the non-display area of ​​the liquid crystal display panel.

Images