Medium and large size liquid crystal display module

Abstract

The invention discloses a medium and large size liquid crystal display module, which comprises a cover plate, an optical transparent adhesive tape, a flexible circuit board assembly and a backlight assembly, and is characterized in that first sectional foam is arranged between glass grooves of the flexible circuit board assembly and the backlight assembly, so that the flexible circuit board assembly and the backlight assembly can be adhered and connected; and the flexible circuit board assembly and the backlight assembly are separated by the first sectional foam, so that poor display of the LCD function caused by the collision of'hard-to-hard 'between the glass and the backlight assembly can be avoided. The second sectional foam is arranged between the cover plate and the retaining wall of the backlight assembly, so that the cover plate and the backlight assembly can be adhered and connected, a gap between the cover plate and the backlight assembly can be filled, buffering and stress area increasing are achieved, and the phenomenon of whitening caused by extrusion of the stress periphery of an LCD is avoided. The hot melt adhesive is arranged at the four corners of the backlight assembly, so that the connection stability can be enhanced, and a limiting effect can be achieved.

Description

Technical Field

[0001] The present application belongs to the field of display technology, and in particular relates to a medium-to-large-sized liquid crystal display module. Background Art

[0002] Traditional medium and large-sized display modules usually include a cover plate (CG), optical clear adhesive (OCA), a flexible circuit board assembly (FOB or FOG) and a backlight assembly (BL). Among them, FOB includes LCD, POL, FPC and PCB board, and FOG includes LCD, POL and FPC.

[0003] However, the existing design has the following disadvantages:

[0004] 1. The backlight assembly is rigidly fixed to the flexible circuit board assembly through double-sided tape, resulting in the LCD being clamped between the rigid cover and the backlight assembly to form a "hard contact" assembly mode. It lacks sufficient buffering and protection, so it is easily damaged during transportation and vibration, resulting in poor display, such as flowery screen, black screen or poor contact.

[0005] 2. The cover plate and the backlight assembly are connected by optically transparent adhesive. Although the optically transparent adhesive has a certain buffering effect, there is still a risk of hard-to-hard contact on the upper surface of the flexible circuit board assembly, which may lead to instability of the overall structure.

[0006] 3. For LCD modules of larger size and weight, the adhesive connection between the cover plate and the backlight assembly needs to be particularly firm to ensure that it will not become detached or separated during long-term use.

[0007] In summary, the structure of existing medium and large-sized liquid crystal display modules has many deficiencies in design and practical application, and needs to be improved urgently. Summary of the invention

[0008] The purpose of this application is to provide a medium-to-large-sized liquid crystal display module to solve the above-mentioned technical problems.

[0009] In order to achieve the above application purpose, the technical solution adopted in this application is as follows:

[0010] The embodiment of the present application provides a medium to large-sized liquid crystal display module, including: a cover plate, an optically transparent adhesive, a flexible circuit board assembly and a backlight assembly. A first segmented foam is arranged between the flexible circuit board assembly and the glass groove of the backlight assembly, a second segmented foam is arranged between the cover plate and the retaining wall of the backlight assembly, and adhesive grooves for accommodating hot melt adhesive are opened at the four corners of the backlight assembly. The hot melt adhesive is used to connect the backlight assembly and the cover plate, and plays a limiting role.

[0011] Optionally, a long strip-shaped glue groove is provided on each right-angle side of the four corners of the backlight assembly.

[0012] Optionally, the first segmented foam and the second segmented foam are both made of 3M material.

[0013] Optionally, the flexible circuit board assembly is FOB or FOG.

[0014] Compared with the prior art, the beneficial effects of the embodiments of the present application are:

[0015] The embodiment of the present application provides a medium-to-large-sized liquid crystal display module. By setting a first segmented foam between the glass groove of the flexible circuit board assembly and the backlight assembly, it can not only play the role of gluing and connecting the flexible circuit board assembly and the backlight assembly, but also the flexible circuit board assembly and the backlight assembly are separated by the first segmented foam, which can avoid the glass and the backlight assembly from having a "hard collision" and causing poor LCD function display. By setting a second segmented foam between the cover plate and the retaining wall of the backlight assembly, it can not only play the role of gluing and connecting the cover plate and the backlight assembly, but also fill the gap between the cover plate and the backlight assembly, play a buffering role and increase the force-bearing area, avoid squeezing the LCD around the force and causing whitening, and avoid LCD rupture and poor black screen display during mechanical testing. By providing adhesive grooves for accommodating hot melt adhesive at the four corners of the backlight assembly, the hot melt adhesive can not only strongly adhere and connect the cover plate and the backlight assembly to prevent the cover plate and the backlight assembly from falling off and separating due to the heavy weight, but also play a limiting role to avoid the problem of extrusion and collision caused by the compression of the first segmented foam and / or the second segmented foam, so as to further prevent the LCD from being subjected to a large extrusion force. The above-mentioned first segmented foam, the second segmented foam and the hot melt adhesive work together to achieve triple protection for the LCD. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic structural diagram of a medium-to-large-sized liquid crystal display module provided in an embodiment of the present application is shown;

[0018] Figure 2 An exploded view of a medium-to-large-sized liquid crystal display module provided in an embodiment of the present application is shown;

[0019] Figure 3 A schematic diagram of the structure of a backlight assembly provided in an embodiment of the present application is shown;

[0020] Figure 4 Shows Figure 3 The upper right corner schematic diagram of the backlight assembly shown;

[0021] Figure 5 A side cross-sectional view of a medium-to-large-sized liquid crystal display module provided in an embodiment of the present application is shown.

[0022] Illustration Description:

[0023] 11. Cover plate; 12. Optically transparent adhesive; 13. Flexible circuit board assembly; 131. LCD; 14. Backlight assembly; 141. Glass groove; 142. Adhesive groove; 21. First segmented foam; 22. Second segmented foam; 31. Hot melt adhesive. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] The embodiment of the present application provides a medium to large-sized liquid crystal display module, which uses foam design on the upper and lower parts of the flexible circuit board assembly to form a "soft-hard-soft" structure to protect the LCD, and uses hot melt adhesive to enhance the connection stability and limit, thereby further protecting the LCD.

[0028] In order to illustrate the technical solution described in this application, a specific embodiment is provided below for illustration.

[0029] See also Figures 1 to 5As shown, the embodiment of the present application provides a medium-to-large-sized liquid crystal display module, including: a cover plate 11, an optically transparent adhesive 12, a flexible circuit board assembly 13 and a backlight assembly 14, a first segmented foam 21 is arranged between the flexible circuit board assembly 13 and the glass groove 141 of the backlight assembly 14, a second segmented foam 22 is arranged between the cover plate 11 and the retaining wall of the backlight assembly 14, and adhesive grooves 142 for accommodating hot melt adhesive 31 are opened at the four corners of the backlight assembly 14, and the hot melt adhesive 31 is used to connect the backlight assembly 14 and the cover plate 11 to enhance the connection stability between the backlight assembly 14 and the cover plate 11, and play a limiting role to avoid extrusion and collision problems caused by compression of the first segmented foam 21 and / or the second segmented foam 22.

[0030] As an optional implementation, a long strip-shaped glue groove 142 is formed on each right-angled side of the four corners of the backlight assembly 14 .

[0031] As an optional implementation, the first segmented foam 21 and the second segmented foam 22 are both made of 3M material, and both sides are sticky to achieve an adhesive connection. The present application embodiment does not specifically limit the thickness of the first segmented foam 21 and the second segmented foam 22, and the design can be adjusted according to actual needs.

[0032] As an optional implementation, the flexible circuit board assembly 13 is FOB or FOG.

[0033] The above-mentioned medium and large-sized liquid crystal display module, by setting the first segmented foam 21 between the flexible circuit board assembly 13 and the glass groove 141 of the backlight assembly 14, can not only play the role of gluing and connecting the flexible circuit board assembly 13 and the backlight assembly 14, but also the flexible circuit board assembly 13 and the backlight assembly 14 are separated by the first segmented foam 21, which can avoid the "hard collision" between the glass and the backlight assembly 14, resulting in poor display of LCD131. By setting the second segmented foam 22 between the cover plate 11 and the retaining wall of the backlight assembly 14, it can not only play the role of gluing and connecting the cover plate 11 and the backlight assembly 14, but also fill the gap between the cover plate 11 and the backlight assembly 14, play a buffering role and increase the force-bearing area, avoid squeezing the surrounding areas of the LCD131 to cause whitening, and avoid the LCD131 from breaking and displaying a black screen during the mechanical test. By opening glue grooves 142 for accommodating hot melt adhesive 31 at the four corners of the backlight assembly 14, the hot melt adhesive 31 can not only play the role of strongly bonding and connecting the cover plate 11 and the backlight assembly 14 to prevent the cover plate 11 and the backlight assembly 14 from falling off and separating due to the heavy weight, but also play a limiting role to avoid extrusion and collision problems caused by the compression of the first segmented foam 21 and / or the second segmented foam 22, so as to further prevent the LCD 131 from being subjected to a large extrusion force.

[0034] In summary, the first segmented foam 21 , the second segmented foam 22 and the hot melt adhesive 31 work together to achieve triple protection for the LCD 131 .

[0035] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A medium or large size liquid crystal display module, comprising: A cover plate, optically transparent adhesive, a flexible circuit board assembly and a backlight assembly, characterized in that a first segmented foam is arranged between the flexible circuit board assembly and the glass groove of the backlight assembly, a second segmented foam is arranged between the cover plate and the retaining wall of the backlight assembly, and adhesive grooves for accommodating hot melt adhesive are opened at the four corners of the backlight assembly, and the hot melt adhesive is used to connect the backlight assembly and the cover plate, and plays a limiting role.

2. A medium-to-large-sized liquid crystal display module according to claim 1, characterized in that: Each right-angled side of the four corners of the backlight assembly is provided with a long strip-shaped glue groove.

3. A medium-to-large-sized liquid crystal display module according to claim 1, characterized in that: The first segmented foam and the second segmented foam are both made of 3M material.

4. The medium-to-large-sized liquid crystal display module according to claim 1, characterized in that: The flexible circuit board assembly is FOB or FOG.

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