Liquid crystal display screen convenient to overhaul and disassemble

Abstract

The utility model discloses a liquid crystal display screen convenient to overhaul and disassemble, which comprises a PCB (printed circuit board), a backlight module, a display module and an iron stand, and a plurality of bonding pads are arranged on the upper surface of the PCB; the backlight module is arranged above the PCB (Printed Circuit Board); the display module is arranged above the backlight module; the iron frame comprises a top plate and a retaining wall extending downwards from the edge of the top plate, the top plate is arranged above the display module, the retaining wall wraps the display module and the backlight module, and a fixing pin perpendicular to the retaining wall is arranged at the tail end of the retaining wall. The positions and the number of the fixing pins correspond to the positions and the number of the bonding pads, and the fixing pins and the bonding pads are welded and fixed. The iron stand and the PCB can be detached and separated easily, the difficulty of analyzing defective products and replacing a backlight module or a display module is reduced, the difficulty of product recovery is greatly reduced, and the competitiveness of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display, and more specifically to a liquid crystal display screen which is convenient for maintenance and disassembly. Background Art

[0002] The LCD screen is mainly composed of a PCB board, a backlight module, a display module and an iron frame, which are stacked in order from bottom to top. The backlight module and the display module are sandwiched between the iron frame and the PCB board. Usually, the iron frame is designed with welding pins, which pass through the PCB board and are then welded and fixed to the PCB board. However, this structure makes it difficult to separate and remove the iron frame after welding, which brings great difficulties to the analysis of defective products and the replacement of the backlight module or display module, and it is difficult to recycle the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to design a liquid crystal display screen which is convenient for maintenance and disassembly, so as to reduce the difficulty of defective product analysis and replacement of a backlight module or a display module.

[0004] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0005] To solve the above technical problems, the utility model provides a liquid crystal display screen which is easy to inspect and disassemble, comprising a PCB board, a backlight module, a display module and an iron frame, wherein a plurality of solder pads are arranged on the upper surface of the PCB board; the backlight module is arranged above the PCB board; the display module is arranged above the backlight module; the iron frame comprises a top plate and a baffle wall extending downward from the edge of the top plate, the top plate is arranged above the display module, the baffle wall wraps the display module and the backlight module, and a fixing pin perpendicular to the baffle wall is arranged at the end of the baffle wall, the position and number of the fixing pins correspond to the position and number of the solder pads, and the fixing pins are welded and fixed to the solder pads.

[0006] As a preferred implementation of the conveniently repaired and disassembled liquid crystal display screen provided by the utility model, compressed foam is arranged between two adjacent retaining walls, and the display module abuts against the compressed foam.

[0007] As a preferred embodiment of the liquid crystal display screen that is easy to inspect and disassemble provided by the utility model, a two-dimensional code laser area is provided on the upper surface of the PCB board, and a first ink layer and a second ink layer provided on the first ink layer are provided on the upper surface of the PCB board located on the two-dimensional code laser area, and a two-dimensional code is formed on the second ink layer by laser, and the colors of the first ink layer and the second ink layer are different.

[0008] As a preferred embodiment of the conveniently repaired and disassembled liquid crystal display screen provided by the utility model, the first ink layer is a black ink layer, and the second ink layer is a white ink layer.

[0009] As a preferred embodiment of the conveniently repaired and disassembled liquid crystal display provided by the utility model, the thickness of the first ink layer is 30 μm. ～ 40 μm, the thickness of the second ink layer is 10 μm ～ 20μm.

[0010] As a preferred embodiment of the LCD display screen that is easy to inspect and disassemble provided by the utility model, the backlight module includes a reflective sheet, a light guide plate and an optical film group arranged above the PCB board, and at least one elastic block is provided between the side of the light guide plate away from the light incident side and the baffle wall.

[0011] As a preferred implementation of the conveniently repaired and disassembled liquid crystal display screen provided by the utility model, at least one protrusion is provided on both sides of the elastic block.

[0012] As a preferred implementation of the conveniently repaired and disassembled liquid crystal display screen provided by the utility model, the elastic block is provided with a shock-absorbing hole between adjacent protrusions.

[0013] As a preferred implementation of the conveniently repaired and disassembled liquid crystal display screen provided by the utility model, grooves are provided on the inner wall of the shock absorbing hole close to the side of the protrusion, and shock absorbing devices are provided between adjacent grooves.

[0014] As a preferred implementation of the conveniently repaired and disassembled liquid crystal display screen provided by the utility model, the shock absorbing device is a spring or two magnets with the same poles facing each other.

[0015] The utility model has the following beneficial effects:

[0016] Since a fixing pin perpendicular to the baffle wall is provided at the end of the baffle wall, the fixing pin is welded and fixed to the pad, that is, the baffle wall is directly welded and fixed to the upper surface of the PCB board, and the fixing pin no longer passes through the PCB board and then is welded and fixed, which is conducive to the disassembly and separation of the iron frame and the PCB board, reduces the difficulty of defective product analysis and replacement of the backlight module or display module, greatly reduces the difficulty of product recycling, and improves the competitiveness of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the scheme in the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are 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.

[0018] Figure 1 The utility model provides a structural schematic diagram of a liquid crystal display screen that is convenient for maintenance and disassembly.

[0019] Figure 2 for Figure 1 sectional view of .

[0020] Figure 3 for Figure 1 Top view of the middle iron frame.

[0021] Figure 4 This is a schematic diagram of the structure of Example 2.

[0022] Figure 5 This is a schematic diagram of the structure of Example 3.

[0023] Figure 6 for Figure 5 Schematic diagram of the structure of the elastic block.

[0024] Description of Figure Numbers:

[0025] PCB board 1; backlight module 2; display module 3; iron frame 4; top plate 41; baffle wall 42; fixing pin 43;

[0026] A first ink layer 11; a second ink layer 12;

[0027] Reflecting sheet 5; light guide plate 6; optical film group 7; elastic block 8; convex block 81; shock absorbing hole 82; groove 83; shock absorbing device 84. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", and "third" 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. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] The utility model provides a liquid crystal display screen which is convenient for maintenance and disassembly, comprising a PCB board, a backlight module, a display module and an iron frame, wherein a plurality of soldering pads are arranged on the upper surface of the PCB board; the backlight module is arranged above the PCB board; the display module is arranged above the backlight module; the iron frame comprises a top plate and a baffle wall extending downward from an edge of the top plate, the top plate is arranged above the display module, the baffle wall wraps the display module and the backlight module, and a fixing pin perpendicular to the baffle wall is arranged at the end of the baffle wall, the position and number of the fixing pin correspond to the position and number of the soldering pad, and the fixing pin is fixed to the soldering pad by welding.

[0032] Since a fixing pin perpendicular to the baffle wall is provided at the end of the baffle wall, the fixing pin is welded and fixed to the pad, that is, the baffle wall is directly welded and fixed to the upper surface of the PCB board, and the fixing pin no longer passes through the PCB board and then is welded and fixed, which is conducive to the disassembly and separation of the iron frame and the PCB board, reduces the difficulty of defective product analysis and replacement of the backlight module or display module, greatly reduces the difficulty of product recycling, and improves the competitiveness of the product.

[0033] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limitations on the present invention.

[0034] Example 1

[0035] See also Figures 1 to 3 , a liquid crystal display screen that is convenient for maintenance and disassembly is provided by the utility model, which includes a PCB board 1, a backlight module 2, a display module 3 and an iron frame 4, a plurality of solder pads are arranged on the upper surface of the PCB board 1; the backlight module 2 is arranged above the PCB board 1; the display module 3 is arranged above the backlight module 2; the iron frame 4 includes a top plate 41 and a baffle wall 42, the baffle wall 42 is formed by extending downward from the edge of the top plate 41, the top plate 41 is arranged above the display module 3, the baffle wall 42 wraps the display module 3 and the backlight module 2, and a fixing pin 43 perpendicular to the baffle wall 42 is arranged at the end of the baffle wall 42, the position and number of the fixing pin 43 correspond to the position and number of the solder pads, and the fixing pin 43 is fixed to the solder pad by welding. Since a fixing pin 43 perpendicular to the blocking wall 42 is provided at the end of the blocking wall 42, the fixing pin 43 is welded and fixed to the pad, that is, the blocking wall 42 is directly welded and fixed to the upper surface of the PCB board 1, and the fixing pin 43 is no longer required to pass through the PCB board 1 and then be welded and fixed, which is conducive to the disassembly and separation of the iron frame 4 and the PCB board 1, reduces the difficulty of defective product analysis and replacement of the backlight module 2 or the display module 3, greatly reduces the difficulty of product recycling, and improves the competitiveness of the product.

[0036] Furthermore, compressed foam is arranged between two adjacent retaining walls 42, and the display module 3 abuts against the compressed foam to increase the friction between the display module 3 and the compressed foam to prevent the display module 3 from shifting due to vibration, while preventing the iron frame 4 from directly acting on the display module 3 to avoid causing compression damage to the display module 3.

[0037] Example 2

[0038] See also Figure 4As a further optimization scheme of Example 1, in this embodiment, a two-dimensional code laser area is further provided on the upper surface of the PCB board 1. A first ink layer 11 and a second ink layer 12 provided on the first ink layer 11 are provided on the upper surface of the PCB board 1 located on the two-dimensional code laser area. The second ink layer 12 is formed with a two-dimensional code by laser. The colors of the first ink layer 11 and the second ink layer 12 are different. Since two layers of ink, the first ink layer 11 and the second ink layer 12, are provided, the second ink layer 12 on the surface is lasered off by laser, exposing the first ink layer 11 on the bottom layer, and the areas where the laser is applied are displayed in different colors. The two-dimensional code generated in this way has a good contrast effect and is easy to scan. At the same time, the two-dimensional code will not fall off or be damaged, which prevents the two-dimensional code from being invalid, and greatly reduces the labor cost.

[0039] Furthermore, the first ink layer 11 is a black ink layer, and the second ink layer 12 is a white ink layer. The contrast between the black ink layer and the white ink layer is better, and the code is easier to scan.

[0040] Furthermore, the thickness of the first ink layer 11 is 30 μm. ～ 40 μm. The thickness of the second ink layer 12 is 10 μm ～ 20μm. This thickness is the thickness that the commonly used ultraviolet laser can just penetrate, and there is no dust around after the laser irradiation, which has the advantages of high rhythm and efficiency. The reason why the thickness of the lower first ink layer 11 is thicker than the thickness of the upper second ink layer 12 is to avoid laser power energy fluctuations and prevent the first ink layer 11 from being penetrated by the laser and causing damage to the internal layer of the PCB board 1.

[0041] Example 3

[0042] See also Figure 5 and Figure 6 As a further optimization scheme of Example 1, in this embodiment, the backlight module 2 includes a reflective sheet 5, a light guide plate 6 and an optical film group 7 arranged above the PCB board 1. At least one elastic block 8 is provided between the side of the light guide plate 6 away from the light incident side and the baffle 42. The elastic block 8 can make the light guide plate 6 firmly abut against the elastic block 8, buffer the impact force of the light guide plate 6 on the lower frame, avoid the collision between the light guide plate 6 and the lower frame and cause noise, and also can improve the service life of the light guide plate 6.

[0043] Furthermore, at least one protrusion 81 is provided on both sides of the elastic block 8 , and the protrusion 81 directly abuts against the light guide plate 6 and the baffle wall 42 of the lower frame, which can align the elastic block 8 with the light guide plate 6 and the baffle wall 42 , further improving the buffering performance of the elastic block 8 .

[0044] As the elastic block 8 is used for a longer time, the elasticity of the elastic block 8 will also weaken due to aging. In order to increase the ability of the elastic block 8 to buffer the impact force and increase the service life of the elastic block 8, the elastic block 8 is provided with a shock-absorbing hole 82 between adjacent protrusions 81. In this embodiment, the shock-absorbing hole 82 is a square hole. When the light guide plate 6 hits the elastic block 8, the elastic block 8 will be concave and deformed in the direction of the shock-absorbing hole 82 to absorb the impact force of the light guide plate 6, thereby further achieving the purpose of shock absorption and noise reduction. It should be noted that the shock-absorbing hole 82 can be a through hole or a blind hole, or an inner hole built into the elastic block 8, which is not limited here and falls within the scope of protection of the utility model. The present embodiment uses a through hole, which is easy to manufacture and has a low production cost. The shape of the shock-absorbing hole 82 can be a square hole or a round hole, which can be selected according to actual conditions and is not limited here.

[0045] In order to further increase the ability of the elastic block 8 to buffer the impact force, a groove 83 is provided on the inner wall of the shock-absorbing hole 82 close to the side of the protrusion 81. In this embodiment, there are only two protrusions 81, so there are only two grooves 83. It is possible to set multiple protrusions 81 and multiple grooves 83 according to actual conditions. A shock-absorbing device 84 is provided between adjacent grooves 83. The shock-absorbing device 84 can be used to further increase the ability of the elastic block 8 to buffer the impact force and absorb the impact force of the light guide plate 6, thereby further achieving the purpose of shock absorption and noise reduction.

[0046] Furthermore, the shock absorbing device 84 is any one of a spring or two magnets with the same poles facing each other. The elastic force of the spring or the repulsive force generated by the two magnets with the same poles facing each other is used to further increase the ability of the elastic block 8 to buffer the impact force. The spring and magnet are standard commodities that can be purchased on the market, and no special customization is required. The procurement cost is low and can be replaced at any time, which is cost-effective.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of this application, directly or indirectly used in other related technical fields, is similarly within the scope of patent protection of this application.

Claims

1. A liquid crystal display screen that is easy to inspect and disassemble, characterized in that: It includes: A PCB board, wherein a plurality of pads are arranged on the upper surface of the PCB board; A backlight module is arranged above the PCB board; A display module, which is arranged above the backlight module; The iron frame includes a top plate and a baffle wall extending downward from the edge of the top plate, wherein the top plate is arranged above the display module, the baffle wall wraps the display module and the backlight module, and the end of the baffle wall is provided with a fixing pin perpendicular to the baffle wall, the position and number of the fixing pins correspond to the position and number of the pads, and the fixing pins are fixed to the pads by welding.

2. The LCD display screen that is easy to disassemble and repair according to claim 1 is characterized in that: Compressed foam is arranged between two adjacent retaining walls, and the display module abuts against the compressed foam.

3. The LCD display screen that is easy to disassemble and repair according to claim 1 is characterized in that: A QR code laser area is provided on the upper surface of the PCB board, and a first ink layer and a second ink layer provided on the first ink layer are provided on the upper surface of the PCB board located on the QR code laser area. The second ink layer is formed with a QR code by laser, and the colors of the first ink layer and the second ink layer are different.

4. The LCD display screen that is easy to disassemble and repair according to claim 3 is characterized in that: The first ink layer is a black ink layer, and the second ink layer is a white ink layer.

5. The LCD display screen that is easy to disassemble and repair according to claim 3 is characterized in that: The thickness of the first ink layer is 30 μm ～ 40 μm, the thickness of the second ink layer is 10 μm ～ 20μm.

6. The LCD display screen that is easy to disassemble and repair according to claim 1 is characterized in that: The backlight module comprises a reflective sheet, a light guide plate and an optical film group arranged above the PCB board, and at least one elastic block is arranged between a side of the light guide plate away from the light incident side and the blocking wall.

7. The LCD display screen that is easy to disassemble and repair according to claim 6 is characterized in that: At least one protrusion is disposed on both sides of the elastic block.

8. The LCD display screen that is easy to disassemble and repair according to claim 7 is characterized in that: The elastic block is provided with a shock absorbing hole between adjacent protrusions.

9. The LCD display screen that is easy to disassemble and repair according to claim 8, characterized in that: Grooves are arranged on the inner wall of the shock absorbing hole on one side close to the protrusion, and shock absorbing devices are arranged between adjacent grooves.

10. The liquid crystal display screen that is easy to inspect and disassemble according to claim 9, characterized in that: The shock absorbing device is a spring or two magnets with the same poles facing each other.

Images