Display screen, display equipment and vehicle

Abstract

The utility model relates to a display screen, display equipment and a vehicle. The display screen comprises a back plate, an optical film and a film fixing assembly. Wherein the back plate comprises a containing groove, and the optical film is arranged in the containing groove. The diaphragm fixing assembly comprises a plurality of first crimping parts, and the first crimping parts are fixedly connected to the side wall of the accommodating groove and can crimp and fix the optical diaphragm located in the accommodating groove. Compared with the situation that different middle frames need to be replaced for display screens of different sizes when the optical film is fixed through middle frame compression joint, the universality of the first compression joint piece is higher.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of display devices, in particular to a display screen, a display device and a vehicle. BACKGROUND

[0002] The display screen mainly comprises a backlight assembly, a cover plate, a liquid crystal display panel and the like. The backlight assembly comprises a back plate, a reflective film, a light guide plate, a middle frame and the like. In the related art, the optical film sheet in the display screen is fixed by pressure bonding through an integrated middle frame. Different sizes of display screens need to use different middle frames, and the versatility of the middle frame is not high. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present disclosure is to provide a display screen, a display device and a vehicle. In the display screen, a plurality of first pressure bonding members are used to pressure bond and fix the optical film sheet. For display screens of different sizes, the number of first pressure bonding members can be adjusted accordingly, and the versatility is high.

[0004] In order to achieve the above-mentioned purpose, the first aspect of the present disclosure provides a display screen, comprising:

[0005] a back plate comprising a receiving groove;

[0006] an optical film sheet arranged in the receiving groove; and

[0007] a film sheet fixing assembly comprising a plurality of first pressure bonding members, the first pressure bonding members being fixedly connected to the side wall of the receiving groove and being capable of pressure bonding and fixing the optical film sheet located in the receiving groove.

[0008] Optionally, the first pressure bonding member comprises a first mounting portion and a first pressure bonding portion connected to the first mounting portion, the first mounting portion being fixedly connected to the side wall, and the first pressure bonding portion extending towards the receiving groove in a direction away from the side wall, for pressure bonding and fixing the optical film sheet.

[0009] Optionally, a limiting portion is arranged on the side wall, and the limiting portion and the first mounting portion are cooperatively mounted.

[0010] Optionally, the limiting portion comprises a limiting groove arranged on the side wall, and the first mounting portion is clamped in the limiting groove.

[0011] Optionally, the limiting groove comprises a first notch towards the inside of the receiving groove and used for avoiding the first pressure bonding portion.

[0012] Optionally, the distance H between the inner wall surface of the side wall on which the optical film sheet and the first pressure bonding member are located and the optical film sheet is greater than or equal to 0.25 mm.

[0013] Optionally, the width G of the overlapping area of the first pressure bonding portion and the optical film sheet is greater than or equal to 0.73 mm.

[0014] Optionally, the display screen further comprises a cover plate arranged at least partially in the accommodating groove, the cover plate and the optical film are respectively arranged at two sides of the first pressing member in the depth direction of the accommodating groove, the first mounting portion is adhered to the cover plate by a first adhesive, and the first mounting portion is further adhered to the inner wall of the limiting groove by a second adhesive.

[0015] Optionally, the side wall is formed with a stepped portion extending towards the accommodating groove, so that the accommodating groove comprises a first groove body and the second groove body which are sequentially communicated in the depth direction of the accommodating groove, and the limiting groove is arranged at the stepped portion.

[0016] Optionally, the first adhesive extends between the notch of the limiting groove towards the cover plate and the inner wall surface of the first groove body.

[0017] Optionally, the distance between the notch of the limiting groove towards the cover plate and the inner wall surface of the first groove body is E≥0.25mm.

[0018] Optionally, the first adhesive comprises an adhesive, the second adhesive comprises double-sided adhesive tape, and the area of the cover plate adhered to the first pressing member is not more than 50% of the total area of the cover plate adhered to the first pressing member and the stepped portion.

[0019] Optionally, the length of the first pressing portion is n≥8mm.

[0020] Optionally, the optical film comprises a PET base film and / or a PC base film.

[0021] Optionally, the display screen further comprises a light bar arranged in the accommodating groove, the light bar is fixedly connected to the side wall, the film fixing assembly further comprises a second pressing member, the second pressing member is fixedly connected to the side wall where the light bar is located and shields the light bar, and the second pressing member cooperates with the first pressing member to press and fix the optical film.

[0022] Optionally, the accommodating groove comprises four sequentially connected side walls, one of the four side walls is used to fix the second pressing member, and the other three sequentially connected side walls are used to fix a plurality of spaced first pressing members.

[0023] Optionally, the second pressing member comprises a second mounting portion and a second pressing portion connected to the second mounting portion, the second mounting portion is fixedly connected to the side wall, and the second pressing portion is arranged to extend towards the accommodating groove in a direction away from the side wall, for press-fixing the optical film.

[0024] Optionally, the second mounting portion is multiple and is arranged at the same side of the second crimping portion.

[0025] Optionally, a second notch is formed on the side wall of the second mounting portion fixedly connected, a first combining portion is arranged in the second notch, a second combining portion is arranged on the second mounting portion, and the first combining portion and the second combining portion are connected in cooperation for fixing the second crimping member.

[0026] Optionally, one of the first combining portion and the second combining portion comprises a clamping groove, and the other comprises a clasp, the clamping groove and the clasp are connected in cooperation to enable the second crimping member to be clamped on the side wall of the accommodating groove.

[0027] Optionally, a part of the second crimping portion close to the second mounting portion is bonded to the side wall.

[0028] The second aspect of the present disclosure provides a display device comprising the display screen provided in the first aspect of the present disclosure.

[0029] The third aspect of the present disclosure provides a vehicle comprising the display screen provided in the first aspect of the present disclosure or the display device provided in the second aspect of the present disclosure.

[0030] According to the above technical solution, the membrane fixing assembly comprises multiple first crimping members fixed on the side wall of the accommodating groove respectively, for fixing the optical membrane, to realize the same function as the integral middle frame. Compared with the related art that the middle frame is used to fix the optical membrane in the display screen, when the multiple first crimping members are used to fix the optical membrane, the number and mounting position of the first crimping members can be adjusted according to the size of the display screen, the first crimping members have stronger versatility than the middle frame, and the assembly is more flexible.

[0031] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0032] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, and are used together with the following specific embodiments to explain the present disclosure, but do not constitute a limitation on the present disclosure. In the drawings:

[0033] Figure 1 is an exploded schematic view of part of the display screen using the middle frame to press the optical membrane in the related art shown in the present disclosure;

[0034] Figure 2 is a front view of the display screen using the middle frame to press the optical membrane in the related art shown in the present disclosure;

[0035] Figure 3 is Figure 2 is an A-A cross-sectional view.

[0036] Figure 4 This is an exploded view of some components of the display screen provided in an exemplary embodiment of this disclosure;

[0037] Figure 5 yes Figure 4 A partial schematic diagram of position C in the middle;

[0038] Figure 6 yes Figure 4 A partial schematic diagram of position D in the middle;

[0039] Figure 7 This is a front view of the display screen provided in an exemplary embodiment of this disclosure;

[0040] Figure 8 yes Figure 7 Schematic diagram of cross-section of JJ;

[0041] Figure 9 yes Figure 7 Schematic diagram of the cross-section of KK;

[0042] Figure 10 This is a front view of the backlight assembly provided in an exemplary embodiment of this disclosure;

[0043] Figure 11 yes Figure 10 A partial schematic diagram of position L in the middle;

[0044] Figure 12 yes Figure 10 Schematic diagram of the MM cross section.

[0045] Explanation of reference numerals in the attached figures

[0046] 1-Backlight assembly; 10-Back panel; 11-Receiving groove; 111-First groove; 112-Second groove; 12-Side wall; 121-Limiting part; 1211-Limiting groove; 1211a-First notch; 122-Step part; 122a-Tabletop; 122a1-Receiving area; 123-First joint; 123a-Snap-on; 124-Second notch; 20-Light strip; 30-Second colloid; 40-Reflective film; 50-Light guide plate; 60-Optical film; 70- Diaphragm fixing assembly; 71-First pressing member; 711-First pressing part; 712-First mounting part; 72-Second pressing member; 721-Second mounting part; 722-Second pressing part; 723-Second joining part; 723a-Slot; 80-Liquid crystal display panel; 90-Optical adhesive; 100-First adhesive; 200-Cover plate; 201-Display part; 202-Frame part; 300-Middle frame; 301-Flanged part; 302-Bending part; 303-Third pressing part. Detailed Implementation

[0047] 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.

[0048] In this disclosure, the X-direction is defined for the display screen, where X-direction is the depth direction of the receiving groove. Unless otherwise stated, directional terms such as "inner" and "outer" refer to the inner and outer sides relative to the contour of the component or structure itself. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not have sequential or importance implications. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same elements.

[0049] like Figures 1 to 3 As shown, in related technologies, the display screen includes a backlight assembly 1, a cover plate 200, and optical adhesive 90, etc. The backlight assembly 1 includes a back plate 10, an emitting film, a light guide plate 50, a middle frame 300, and LED strips 20, etc. The back plate 10 includes a receiving groove 11, in which a reflective film 40, a light guide plate 50, and an optical film 60 are all disposed. The middle frame 300 is fixedly connected to the side wall 12 of the receiving groove 11 and is used to press and fix the optical film 60. The cover plate 200 includes a display section 201 and a bezel section 202. The display section 201 is used to display an image, and the bezel section 202 can be used to shield the middle frame 300.

[0050] like Figure 3As shown, the display screen uses an integrated mid-frame 300 to press and fix the optical film 60. The mid-frame 300 includes a third pressing part 303, a bending part 302, and a flange part 301. The flange part 301 is fixed to the side wall 12 of the receiving groove 11. The bending part 302 extends towards the bottom of the receiving groove 11 along the depth direction of the receiving groove 11. The third pressing part 303 is located at the end of the bending part 302 away from the flange part 301. The third pressing part 303 extends into the receiving groove 11 in a direction away from the side wall 12 and is used to press and fix the optical film 60. The inventors discovered that when the middle frame 300 is installed on the side wall 12 of the receiving groove 11, there is a gap between the bent portion 302 of the middle frame 300 and the side wall 12. Furthermore, because the middle frame 300 has the bent portion 302, the bent portion 302 and the gap between the bent portion 302 and the side wall 12 occupy space in the receiving groove 11. Due to the existence of the width B of the space occupied by the bent portion 302 and the gap between the bent portion 302 and the side wall 12, the distance between the liquid crystal display panel 80 in the display screen and the side wall 12 of the receiving groove 11 is relatively large in order to avoid the bent portion 302. In addition, the optical film 60 and the liquid crystal display panel 80 need to be correspondingly arranged, and the distance between the optical film 60 and the side wall 12 of the receiving groove 11 is also relatively large. In the middle frame 300, the third pressing part 303, while ensuring the optical film 60 can be pressed and fixed, also has a larger distance between the end of the third pressing part 303 away from the bending part 302 and the side wall 12 of the receiving groove 11. Therefore, in order to cover the third pressing part 303, the bezel part 202 of the cover plate 200 in the display screen has a larger width, thereby reducing the proportion of the area occupied by the display part 201 in the entire cover plate 200. Furthermore, in related technologies, the width P of the flange part 301 bonded to the bottom surface of the receiving groove 11 is typically greater than or equal to 1.4 mm, and the width Q of the bezel part 202 is generally 5 mm or more.

[0051] The first aspect of this disclosure provides a display screen, such as Figures 4 to 12 As shown, the device includes a back plate 10, an optical film 60, and a film fixing assembly 70. The back plate 10 includes a receiving groove 11, in which the optical film 60 is disposed. The film fixing assembly 70 includes a plurality of first pressing members 71, which are fixedly connected to the side wall 12 of the receiving groove 11 and are capable of pressing and fixing the optical film 60 located within the receiving groove 11.

[0052] In the above embodiments, compared to the use of an integrated mid-frame 300 to press and fix the optical film 60 in related technologies, the present disclosure uses multiple first pressing members 71 to press and fix the optical film 60 located in the receiving groove 11, which has greater versatility. For example, for displays of different sizes, the number and position of the first pressing members 71 can be adjusted to achieve the pressing and fixing of the optical film 60. Compared to using a mid-frame 300 to press and fix the optical film 60, which requires different mid-frames 300 for different sizes of displays, the first pressing members 71 have greater versatility. In addition, using multiple first pressing members 71 to fix the optical film 60 allows for adjustment of the position of the multiple first pressing members 71 according to the size of the display, resulting in greater flexibility during assembly.

[0053] In some embodiments of this disclosure, such as Figures 4 to 12 As shown, the first crimping member 71 includes a first mounting portion 712 and a first crimping portion 711 connected to the first mounting portion 712. The first mounting portion 712 is fixedly connected to the side wall 12, and the first crimping portion 711 extends toward the receiving groove 11 in a direction away from the side wall 12 for crimping and fixing the optical film 60.

[0054] In the above embodiment, the first pressing member 71 does not have the bending portion 302 in the middle frame 300 compared to the middle frame 300. Therefore, the size of the distance between the liquid crystal display panel 80 and the optical film 60 in the display screen and the side wall 12 of the receiving groove 11 can be smaller, and the first pressing portion 711 of the first pressing member 71 is closer to the side wall 12 of the receiving groove 11 at the end away from the first mounting portion 712.

[0055] It should be understood that the display screen of this disclosure includes a cover plate 200, which includes a display portion 201 and a bezel portion 202. When the end of the first pressing portion 711 of the first pressing member 71, which is away from the first mounting portion 712, is closer to the side wall 12 of the receiving groove 11, the bezel portion 202 on the cover plate 200 can also be adaptively narrowed, thereby increasing the proportion of the display portion 201 on the cover plate 200. This narrows the bezel of the display screen and increases the ratio of the area of ​​the display area to the entire display screen.

[0056] In some embodiments, the width F of the bezel portion 202 on the cover plate 200 can generally be 4mm. Compared to using the middle frame 300 to press and fix the optical film 60 in the display screen, using the first pressing member 71 can narrow the width of at least a portion of the bezel portion 202, thereby increasing the proportion of the display portion 201 of the display screen.

[0057] Of course, the fact that the width of the border portion 202 can be 4mm is just one implementation of the width of the border portion 202, and does not limit the width F of the border portion 202.

[0058] In some implementations, such as Figure 4 , Figure 5 as well as Figures 8 to 11 As shown, a limiting part 121 is provided on the side wall 12. The limiting part 121 and the first mounting part 712 are installed together so that the first pressing member 71 is installed in the side wall 12.

[0059] In some embodiments, the limiting part 121 can be constructed in any suitable form according to actual needs. For example, the limiting part 121 includes a limiting groove 1211 provided in the side wall 12, and the first mounting part 712 can be engaged in the limiting groove 1211 to limit the first pressing member 71 and prevent the first pressing member 71 from tilting toward the receiving groove 11.

[0060] In some embodiments, the limiting groove 1211 includes a first notch 1211a facing inward into the receiving groove 11 and used to avoid the first crimping part 711. The provision of the first notch 1211a in the limiting groove 1211 also facilitates the installation of the first crimping member 71.

[0061] In the above embodiment, the first mounting portion 712 of the first pressing member 71 can be bonded to the inner wall of the limiting groove 1211.

[0062] In some implementations, such as Figure 11 As shown, the first crimping member 71 can be constructed as a T-shaped structure, and the first crimping member 71 can be precisely engaged in the limiting groove 1211.

[0063] In some embodiments, as described above, the display screen further includes a cover plate 200, which is at least partially disposed in the receiving groove 11. The cover plate 200 and the optical film 60 are respectively disposed on both sides of the first pressing member 71 in the depth direction of the receiving groove 11. The first mounting part 712 is bonded to the cover plate 200 by the first adhesive 100, and the first mounting part 712 is also bonded to the inner wall of the limiting groove 1211 by the second adhesive 30.

[0064] In the above embodiments, the first colloid 100 and the second colloid 30 can be any suitable colloid according to actual needs. For example, the first colloid 100 can be an adhesive, and the adhesive can be a hot melt adhesive. The second colloid 30 can be double-sided tape, and there is no limitation here.

[0065] In some embodiments, the sidewall 12 is formed with a stepped portion 122 extending toward the receiving groove 11, such that the receiving groove 11 includes a first groove 111 and a second groove 112 connected sequentially along the depth direction of the receiving groove 11, and a limiting groove 1211 is provided on the stepped portion 122.

[0066] In the above-described embodiment, the step portion 122 facilitates the installation of the limiting groove 1211. Furthermore, the cover plate 200 can be at least partially disposed in the first groove 111, resulting in a more refined overall appearance of the display screen.

[0067] In some embodiments, the first mounting portion 712 of the first crimping member 71 is snapped into the limiting groove 1211. Due to assembly errors, there is usually a gap between the first mounting portion 712 of the first crimping member 71 and the side wall of the limiting groove 1211 facing away from the first notch 1211a. The first colloid 100 can extend from the first mounting portion 712 to the groove of the limiting groove 1211 facing the cover plate 200 and the inner wall of the first groove 111, which can prevent dust and moisture from entering the display screen and avoid affecting the user experience and product life.

[0068] In some specific embodiments, the distance E between the opening of the limiting groove 1211 facing the cover plate 200 and the inner wall surface of the first groove 111 is ≥0.25mm, so as to ensure that the first colloid 100 can cover the first mounting part 712 and extend to the space between the opening of the limiting groove 1211 in the depth direction of the receiving groove 11 and the inner wall surface of the first groove 111.

[0069] In some embodiments, the opening of the limiting groove 1211 in the depth direction of the receiving groove 11 is located on the platform 122a of the step portion 122. It is not possible to achieve zero gap between the first pressing member 71 and the inner wall of the limiting groove 1211. A receiving area 122a1 needs to be formed between the opening of the limiting groove 1211 in the depth direction of the receiving groove 11 and the inner wall of the first groove 111. The width dimension of the receiving area 122a1 is also the distance dimension E between the opening of the limiting groove 1211 in the direction of the cover plate 200 and the inner wall of the first groove 111. The tolerance of dimension E is generally ±0.05mm. When the first adhesive 100 uses an adhesive, the width tolerance is generally ±0.10mm. The positional tolerance of the first adhesive 100 is generally ±0.10mm. The cumulative tolerance is 0.1 + 0.1 + 0.05 = 0.25mm. Therefore, dimension E should be ≥0.25mm to ensure that the first adhesive 100 can cover the first mounting portion 712 and extend to the receiving area 122a1.

[0070] In some embodiments, as mentioned above, the first adhesive 100 includes an adhesive, the second adhesive 30 includes a double-sided adhesive, the first pressing member 71 is bonded to the bottom surface of the limiting groove 1211 by the double-sided adhesive, the first pressing member 71 is bonded to the cover plate 200 by the first adhesive 100, and the area of ​​the cover plate 200 bonded to the first pressing member 71 does not exceed 50% of the total area of ​​the cover plate 200 bonded to the first pressing member 71 and the step portion 122, which enables the cover plate 200 to be more firmly bonded to the back plate 10 assembly.

[0071] In some exemplary embodiments, as described above, the first adhesive 100 can be an adhesive, and the second adhesive 30 can be a double-sided adhesive. The cover plate 200 can first be bonded to the first pressing member 71 and the step portion 122 via the first adhesive 100. The first pressing member 71 is then bonded to the bottom surface of the limiting groove 1211 via the second adhesive 30. Generally, the adhesive strength of the adhesive is stronger than that of the double-sided adhesive. The larger the bonding area between the cover plate 200 and the first pressing member 71, the weaker the adhesion between the cover plate 200 and the backlight assembly 1. Therefore, the area of ​​the cover plate 200 bonded to the first pressing member 71 does not exceed 50% of the total area of ​​the cover plate 200 bonded to the first pressing member 71 and the step portion 122, which enables the cover plate 200 to be more firmly bonded to the back panel 10 assembly.

[0072] In some embodiments, the display screen typically needs to undergo vibration testing. The smaller the size of the first pressing portion 711 of the first pressing member 71, the smaller the contact area between the first pressing portion 711 and the optical film 60. During the vibration of the display screen, the local friction force at the contact portion between the first pressing portion 711 and the optical film 60 is greater, and the optical film 60 is more easily scratched. In addition, because the width of the bezel portion 202 of the display screen needs to be limited, the extension length of the first pressing portion 711 of the first pressing member 71 towards the receiving groove 11 in the direction away from the side wall 12 where the first pressing member 71 is located is limited. The length n of the first pressing portion 711 of the first pressing member 71 in the extension direction of the side wall 12 where the first pressing member 71 is located is ≥ 8 mm, so as to avoid the display screen being scratched during the vibration test.

[0073] In some embodiments, the display screen also includes a light strip 20 disposed in the receiving groove 11, the light strip 20 being fixedly connected to the side wall 12, and the diaphragm fixing assembly 70 further includes a second pressing member 72, the second pressing member 72 being fixedly connected to the side wall 12 where the light strip 20 is located and shielding the light strip 20, the second pressing member 72 cooperating with the first pressing member 71 for pressing and fixing the optical diaphragm 60.

[0074] In the above-described embodiments, such as Figure 9 As shown, the backlight assembly 1 also includes a reflective film 40 and a light guide plate 50 disposed in the receiving groove 11. The reflective film 40, the light guide plate 50, and the optical film 60 are stacked sequentially in the depth direction of the receiving groove 11 away from the bottom surface of the receiving groove 11. The light strip 20 is fixedly connected to the inner wall surface of the side wall 12 of the receiving groove 11. A row of LED light sources is arranged on the light strip 20. The second pressing member 72 is used to completely cover the LED light sources to prevent the light emitted by the LED light sources from directly entering the liquid crystal display panel 80 without passing through the light guide plate 50 and the optical film 60, thus affecting the display effect of the display screen.

[0075] In some embodiments, the second crimping member 72 includes a second mounting portion 721 and a second crimping portion 722 connected to the second mounting portion 721. The second mounting portion 721 is fixedly connected to the side wall 12, and the second crimping portion 722 extends toward the receiving groove 11 for crimping and fixing the optical film 60.

[0076] In the above embodiment, the second pressing portion 722 of the second pressing member 72 can be used to press and fix the optical film 60, and can also shield the lamp strip 20. In order for the second pressing portion 722 of the second pressing member 72 to shield the lamp strip 20, the second pressing portion 722 of the second pressing member 72 extends toward the receiving groove in a direction away from the side wall 12, and the second pressing member 72 extends in the extending direction of the side wall 12 where the second pressing member 72 is located.

[0077] In some embodiments, there are multiple second mounting portions 721 that are spaced apart on the same side of the second crimping portions 722. The arrangement of multiple second crimping portions 722 enables the second crimping member 72 to be more firmly fixed to the side wall 12 of the receiving groove 11.

[0078] In some embodiments, a second notch 124 is formed on the side wall 12 to which the second mounting part 721 is fixedly connected, and a first connecting part 123 is provided in the second notch 124. The second mounting part 721 is provided with a second connecting part 723, and the first connecting part 123 and the second connecting part 723 are connected to each other to fix the second crimping member 72.

[0079] Furthermore, when there are multiple second mounting portions 721 of the second crimping member 72 and the second crimping portions 722 are spaced apart on the same side, a second notch 124 corresponding to each of the multiple second mounting portions 721 can be formed on the side wall 12 to which the second mounting portion 721 is fixedly connected. The corresponding second notch 124 and the second mounting portion 721 are connected by the cooperation of the first connecting portion 123 and the second connecting portion 723, so that the second mounting portion 721 is fixed in the second notch 124 of the side wall 12.

[0080] In some embodiments, the first coupling portion 123 and the second coupling portion 723 may be constructed in any suitable form according to actual needs. For example, one of the first coupling portion 123 and the second coupling portion 723 may include a slot 723a and the other may include a snap fastener 123a, with the slot 723a and the snap fastener 123a engaging to engage the second pressing member 72 with the side wall 12 of the receiving groove 11.

[0081] like Figure 9As shown, the first connecting portion 123 includes a snap fastener 123a disposed within the second notch 124, and the second connecting portion 723 includes a slot 723a disposed within the second mounting portion 721. Through the snap-fit ​​engagement of the snap fastener 123a and the slot 723a, the second pressing member 72 is snapped onto the side wall 12 of the receiving groove 11. It should be understood that the second pressing member 72 can be detached from the side wall 12, which will not be described further here.

[0082] In some other possible embodiments, the first connecting part 123 may include a limiting hole provided in the second notch 124 of the side wall 12 of the receiving groove 11, and the second connecting part 723 may include a pin provided in the second mounting part 721. The second pressing member 72 is fixed to the side wall 12 of the receiving groove 11 by the insertion and engagement of the pin and the limiting hole.

[0083] In some embodiments, the portion of the second crimping portion 722 near the second mounting portion 721 may be bonded to the sidewall 12. For example... Figure 9 As shown, the portion of the second crimping part 722 near the second mounting part 721 can be bonded to the side wall 12 by the second adhesive 30, wherein the second adhesive 30 can be double-sided adhesive.

[0084] In some embodiments, as described above, the second crimping portion 722 of the second crimping member 72 near the second mounting portion 721 can be bonded to the side wall 12 of the receiving groove 11 with double-sided adhesive, and the second mounting portion 721 of the second crimping member 72 and the second notch 124 of the side wall 12 can be engaged by a snap fastener 123a and a slot 723a, so that the second crimping member 72 is more securely fixed to the side wall 12 of the receiving groove 11.

[0085] like Figure 4 As shown, in some embodiments, the receiving groove 11 includes four side walls 12 connected in sequence. One of the four side walls 12 can be used to fix the second crimping member 72, and the other three connected in sequence can be used to fix a plurality of spaced-apart first crimping members 71.

[0086] In the above embodiment, the dimensions of the three sidewalls 12 used to fix the first pressing member 71 among the four sequentially connected sidewalls 12 can be narrowed, thereby narrowing the width of the corresponding bezel portion 202 on the cover plate 200, and thus increasing the ratio of the area of ​​the display portion 201 on the cover plate 200 to the area of ​​the cover plate 200. This narrowing of the three bezel widths of the display screen increases the proportion of the display area of ​​the display screen.

[0087] In some specific implementation methods, such as Figures 4 to 11As shown, the backlight assembly 1 in the display screen includes a back plate 10 with a receiving groove 11. The back plate 10 assembly includes a reflective film 40, a light guide plate 50, an optical film 60, a lamp strip 20, a first pressing member 71, and a second pressing member 72. The display screen also includes a liquid crystal display panel 80, optical adhesive 90, and a cover plate 200. The reflective film 40, the light guide plate 50, and the optical film 60 are stacked sequentially from the bottom to the opening of the receiving groove 11. The lamp strip 20 is bonded to one of the four side walls 12. The other three side walls 12 are pressed and fixed to the optical film 60 by the first pressing member 71. The side wall 12 to which the lamp strip 20 is bonded can be used to fix the second pressing member 72. The second pressing member 72 is used to fix and press the optical film 60 and to shield the lamp strip 20. The cover plate 200 is at least partially disposed in the receiving groove 11 and spaced apart from the optical film 60. The cover plate 200 and the optical film 60 are respectively disposed on both sides of the first pressing member 71 in the depth direction of the receiving groove 11. The liquid crystal display panel 80 is bonded to the cover plate 200 by optical adhesive 90.

[0088] In some embodiments, the first pressing member 71 can be made of metal or plastic. Metal can be formed by die casting or CNC (Computer Numerical Control) machine tools, and plastic can be formed by injection molding. There are no restrictions here. The second pressing member 72 can be made of sheet metal or plastic. Sheet metal can be formed by stamping, and plastic can be formed by injection molding. There are no restrictions here.

[0089] In some specific embodiments, the four sequentially connected sidewalls 12 of the back plate 10 form a rectangular frame, and the four sequentially connected sidewalls 12 forming the rectangular frame form a receiving groove 11 between the bottom wall of the back plate 10. The reflective film 40, the light guide plate 50, and the optical film 60 are sequentially stacked from the bottom surface of the receiving groove 11 toward the opening of the receiving groove 11. One of the four sidewalls 12 of the receiving groove 11 is fixedly connected to a light strip 20. The second pressing member 72 fixed on the sidewall 12 where the light strip 20 is located and a plurality of first pressing members 71 spaced apart on the other three sequentially connected sidewalls 12 cooperate to press and fix the optical film 60.

[0090] In some embodiments, the optical film 60 includes a PET (Polyethylene terephthalate) substrate film and / or a PC (Polycarbonate) substrate film. Of course, the optical film 60 may also be made of other substrates, and there is no limitation here.

[0091] It should be understood that the PET substrate films mentioned above are generally films with polyethylene terephthalate as the substrate; PC substrate films are generally films with polycarbonate as the substrate. Further details will not be elaborated here.

[0092] In addition, the optical film 60 can be a polarizing film, an augmenting film, or a diffusion film, etc., and there are no restrictions here.

[0093] In some embodiments, the distance between the two opposite edges of the optical film 60 that are both pressed and fixed by the first pressing member 71 can be defined as the length dimension of the optical film 60, and the distance between the edge of the optical film 60 that is pressed and fixed by the second pressing member 72 and the other edge opposite to that edge can be defined as the width dimension of the optical film 60. Generally, the width dimension of the optical film 60 is less than or equal to the length dimension of the optical film 60.

[0094] Furthermore, in some embodiments, the optical diaphragm 60 expands when heated and contracts when cooled due to thermal expansion and contraction. In order to avoid the optical diaphragm 60 from interfering with the side wall 12 of the receiving groove 11 due to the expansion of the optical diaphragm 60 after heating, which would cause the optical diaphragm 60 to wrinkle, the distance H between the optical diaphragm 60 and the inner wall surface of the side wall 12 where the first pressing member 71 is located is ≥0.25mm.

[0095] In the above embodiments, when the distance H between the inner wall surface of the side wall 12 where the optical diaphragm 60 and the first pressing member 71 are located is ≥0.25mm, it is possible to ensure that when the length of the optical diaphragm 60 is greater than or equal to 235mm, the optical diaphragm 60 does not interfere with the side wall 12 of the receiving groove 11 after thermal expansion.

[0096] In some embodiments, the optical diaphragm 60 will shrink after being cooled due to thermal expansion and contraction. In order to prevent the optical diaphragm 60 from being detached from the first pressing member 71 due to the effects of its shrinkage, dimensional tolerance, assembly tolerance and mechanical impact on the diaphragm deformation, the overlap width G between the first pressing part 711 and the optical diaphragm 60 is ≥0.73mm.

[0097] In the above embodiments, when the width G of the overlap area between the first pressing part 711 and the optical film 60 is ≥0.73mm, it is possible to prevent the optical film 60 from detaching from the pressing of the first pressing part 71 when the length dimension of the optical film 60 is ≥235mm, under the influence of film deformation caused by cold shrinkage, dimensional tolerance, assembly tolerance and mechanical impact.

[0098] In some embodiments, when the distance H between the optical film 60 and the inner wall surface of the side wall 12 where the first pressing member 71 is located is ≥0.25mm and the width G of the overlapping area between the first pressing part 711 and the optical film 60 is ≥0.73mm, the size F of the frame portion 202 of the cover plate 200 can be 4mm.

[0099] In some implementations, the display screen typically needs to pass a reliability test at a high temperature of 95°C and a low temperature of -40°C.

[0100] In the reliability test at 95℃, the expansion of the optical film 60 is calculated as: film size × coefficient of thermal expansion × temperature change. As shown in Table 1, when the film length is 235mm, the expansion of the PET substrate is approximately 0.49mm, and the expansion of the PC substrate is approximately 1.37mm. The distance H between the optical film 60 and the inner wall of the side wall 12 where the first pressing member 71 is located is half of the expansion amount. Therefore, the required size H for a display screen using a PET substrate film is ≥0.25mm, and the required size H for a display screen using a PC substrate film is ≥0.68mm.

[0101] Table 1: Comparison of dimension H between PET substrate film and PC substrate film in reliability test at 95℃;

[0102]

[0103] In the reliability test at -40℃, the shrinkage of the optical film 60 is calculated as: film size × coefficient of thermal expansion × temperature change. As shown in Table 2, when the film size is 235mm, the shrinkage of the PET substrate is approximately 0.46mm, and the shrinkage of the PC substrate is approximately 1.27mm. To ensure that the optical film 60 does not detach from the first pressing member 71 under the influence of dimensional tolerances, assembly tolerances, and mechanical impact deformation in a low-temperature environment, the overlap width G between the first pressing part 711 and the optical film 60 needs a safety value of 1.0mm. As shown in Table 2, the design value = shrinkage + safety value. The required dimension G on one side is half the design value; therefore, the required dimension G for a display screen using a PET substrate film is ≥0.73mm, and the required dimension G for a display screen using a PC substrate film is ≥1.13mm.

[0104] Table 2: Comparison of dimension G between PET substrate film and PC substrate film in reliability test at -40℃;

[0105]

[0106] Therefore, according to the calculations in Tables 1 and 2 above, when the length of the film is greater than 235mm, the distance H between the inner wall surface of the side wall 12 where the optical film 60 and the first pressing part 71 are located needs to be ≥0.25mm and the overlap width G between the first pressing part 711 and the optical film 60 needs to be ≥0.73mm. The optical film 60 can be made of PET film.

[0107] In some embodiments, when the width F of the frame portion 202 of the cover plate 200 in the display screen is 4mm, the width I of the bottom surface of the limiting groove 1211 is ≥1.1mm, so that there is sufficient area to stably bond the first mounting portion 712 to the bottom surface of the limiting groove 1211. The reserved size for G+H in the receiving groove 11 of the display screen is approximately 1.8mm. When the optical film 60 is 235mm, according to the calculations in Tables 1 and 2 above, the display screen using PET substrate film needs G+H ≥0.98mm, and the actual reserved G+H is approximately 1.8mm, which meets the reliability requirements; the display screen using PC substrate film needs G+H ≥1.81mm, and the actual reserved G+H is approximately 1.8mm, which just fails to meet the reliability requirements, and the larger the film size, the less it meets the reliability requirements. Therefore, when the film length is greater than 235mm, according to this calculation method, the display screen of this patent needs to use an optical film 60 with a PET substrate. That is, when the width F of the bezel portion 202 of the cover plate 200 of the display screen is 4mm and the film size is greater than 235mm, the optical film 60 can be a film with a PET substrate.

[0108] A second aspect of this disclosure provides a display device, including the display screen provided in the first aspect of this disclosure. The display device includes, but is not limited to, mobile phones, tablets, and monitors.

[0109] This third aspect of the disclosure provides a vehicle including a display screen as provided in the first aspect of the disclosure and / or a display device as provided in the second aspect of the disclosure. The display screen includes, but is not limited to, an instrument cluster screen, a central control screen, a passenger-side entertainment screen, and a rear-seat entertainment screen, etc., which will not be elaborated further here.

[0110] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0111] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0112] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A display screen, characterized in that, include: Back panel, including receiving groove; An optical film is disposed in the receiving groove; and The diaphragm fixing assembly includes a plurality of first pressing members, which are fixedly connected to the side wall of the receiving groove and are capable of pressing and fixing the optical diaphragm located in the receiving groove.

2. The display screen according to claim 1, characterized in that, The first pressing member includes a first mounting part and a first pressing part connected to the first mounting part. The first mounting part is fixedly connected to the side wall, and the first pressing part extends toward the receiving groove in a direction away from the side wall for pressing and fixing the optical film.

3. The display screen according to claim 2, characterized in that, A limiting part is provided on the side wall, and the limiting part and the first mounting part are installed together.

4. The display screen according to claim 3, characterized in that, The limiting part includes a limiting groove disposed on the side wall, and the first mounting part is engaged with the limiting groove.

5. The display screen according to claim 4, characterized in that, The limiting groove includes a first notch facing inwards from the receiving groove and used to avoid the first pressing part.

6. The display screen according to any one of claims 2-5, characterized in that, The distance H between the optical film and the inner wall surface of the sidewall where the first pressing member is located is ≥0.25mm.

7. The display screen according to any one of claims 2-5, characterized in that, The width G of the overlap area between the first pressing part and the optical film is ≥0.73mm.

8. The display screen according to claim 4 or 5, characterized in that, The display screen further includes a cover plate at least partially disposed in the receiving groove. The cover plate and the optical film are respectively disposed on both sides of the first pressing member in the depth direction of the receiving groove. The first mounting part is bonded to the cover plate by a first adhesive and is also bonded to the inner wall of the limiting groove by a second adhesive.

9. The display screen according to claim 8, characterized in that, The sidewall is formed with a stepped portion extending toward the receiving groove, so that the receiving groove includes a first groove and a second groove that are sequentially connected along the depth direction of the receiving groove, and the limiting groove is provided on the stepped portion.

10. The display screen according to claim 9, characterized in that, The first colloid extends from the first mounting portion to the space between the opening of the limiting groove facing the cover plate and the inner wall of the first groove.

11. The display screen according to claim 10, characterized in that, The distance E between the opening of the limiting groove facing the cover plate and the inner wall of the first groove is ≥0.25mm.

12. The display screen according to claim 10, characterized in that, The first colloid includes an adhesive, the second colloid includes double-sided adhesive, and the area of ​​the cover plate bonded to the first pressing member does not exceed 50% of the total area of ​​the cover plate bonded to the first pressing member and the step portion.

13. The display screen according to any one of claims 2-5, characterized in that, The length n of the first crimping part is ≥ 8 mm.

14. The display screen according to any one of claims 1-5, characterized in that, The optical film includes PET substrate film and / or PC substrate film.

15. The display screen according to claim 1, characterized in that, The display screen also includes a light strip disposed in the receiving groove, the light strip being fixedly connected to the side wall, and the film fixing assembly further includes a second pressing member, the second pressing member being fixedly connected to the side wall where the light strip is located and shielding the light strip, the second pressing member cooperating with the first pressing member to press and fix the optical film.

16. The display screen according to claim 15, characterized in that, The receiving groove includes four side walls connected in sequence. One of the four side walls is used to fix the second pressing member, and the other three are connected in sequence to fix a plurality of first pressing members arranged at intervals.

17. The display screen according to claim 15 or 16, characterized in that, The second pressing member includes a second mounting portion and a second pressing portion connected to the second mounting portion. The second mounting portion is fixedly connected to the side wall, and the second pressing portion extends toward the receiving groove in a direction away from the side wall for pressing and fixing the optical film.

18. The display screen according to claim 17, characterized in that, The second mounting portion is multiple and is spaced apart on the same side of the second crimping portion.

19. The display screen according to claim 17, characterized in that, A second notch is formed on the side wall to which the second mounting part is fixedly connected. A first connecting part is provided in the second notch. A second connecting part is provided on the second mounting part. The first connecting part and the second connecting part are connected to each other to fix the second pressing member.

20. The display screen according to claim 19, characterized in that, One of the first joint and the second joint includes a slot and the other includes a buckle. The slot and the buckle engage to engage the second pressing member with the side wall of the receiving groove.

21. The display screen according to claim 17, characterized in that, The portion of the second pressing part near the second mounting part is bonded to the side wall.

22. A display device, characterized in that, Includes the display screen as described in any one of claims 1-21.

23. A vehicle, characterized in that, Includes the display screen as described in any one of claims 1-21 or the display device as described in claim 22.

Images