Liquid crystal display module

Abstract

The utility model discloses a liquid crystal display module which comprises an iron stand, an LCD screen, a backlight, a PCB and a conductive adhesive tape, the LCD screen and the backlight are installed inside the iron stand, the right side of the iron stand is fixedly connected with a plurality of limiting twist feet, the PCB is provided with a plurality of installation holes, the edges of the installation holes are provided with copper exposing areas, and the copper exposing areas are provided with conductive adhesive tapes. And the conductive adhesive tape is positioned between the LCD screen and the PCB. According to the liquid crystal display module provided by the utility model, the limiting twisting pin is designed into the three-step twisting pin clamping positions, when the twisting force between the iron stand and the PCB is too large, the twisting pin clamping position on the lowest side is used for carrying out fixing operation with the PCB, and when the twisting force between the iron stand and the PCB is too small, the twisting pin clamping position on the uppermost side is used for carrying out fixing operation with the PCB; therefore, the connection conduction performance of the conductive adhesive tape, the LCD screen and the PCB is improved, and stable conduction can be realized even if tolerance exists during production and manufacturing.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid crystal display modules, and particularly relates to a liquid crystal display module. Background Art

[0002] With the increasing number of electronic products, the performance requirements for display modules are also increasing. For example, Figure 1 and Figure 2 As shown in the ordinary display module, the main structural components of the display module include an LCD screen 111, a metal iron frame 112, and a PCB board 113. During assembly, the limiting twist feet 114 on the iron frame 11 need to be inserted into the mounting holes 115 of the PCB board 113. After insertion, there will be a section of the limiting twist feet 114. In order to achieve reliable electrical connection between the two, a twisting operation is required, that is, the excess limiting twist feet 114 are pressed onto the corresponding copper exposed area 116 of the PCB board 113;

[0003] In the existing liquid crystal display module, the conductive rubber strip 117 between the LCD screen 111 and the PCB board 113 is pressed tightly by the iron frame 112 to achieve signal connection and conduction between the LCD screen 111 and the PCB board 113. Since there will be tolerance problems in the production and manufacturing of materials, if the tolerance is on the upper limit, after the limiting twist feet 114 are tightened with the PCB board 113, the conductive rubber strip 117 will not be in close contact with the LCD screen 111 or the PCB board 113, resulting in the inability of the LCD screen 111 and the PCB board 113 to communicate normally, and the module will display abnormally. If the tolerance is on the lower limit, after the limiting twist feet 114 are tightened with the PCB board 113, the pressure of the conductive rubber strip 117 between the LCD screen 111 and the PCB board 113 is too large, which may damage the LCD screen 111. Summary of the Utility Model

[0004] Based on this, in view of the above technical problems, it is necessary to provide a liquid crystal display module. By designing the contact position between the limiting twist feet of the iron frame and the copper exposed area of the PCB board as a three-step twist foot clamping position, stable conduction can be achieved even if there are tolerances during production and manufacturing.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A liquid crystal display module, comprising:

[0007] An iron frame, an LCD screen, a backlight, a PCB board and a conductive rubber strip. The LCD screen and the backlight are installed inside the iron frame. A plurality of limiting twist feet are fixedly connected to the right side of the iron frame. A plurality of mounting holes are provided on the PCB board, and a copper exposed area is arranged at the edge of the mounting hole. The conductive rubber strip is located between the LCD screen and the PCB board. The limiting twist feet penetrate through the mounting holes and contact and press the conductive rubber strip with the copper exposed area. The conductive rubber strip is used to realize the signal connection and conduction between the LCD screen and the PCB board.

[0008] Further, a plurality of twist foot clamping positions are provided at the contact position between the limiting twist feet and the copper exposed area.

[0009] Further, the number of the twist foot clamping positions is three, and the three twist foot clamping positions are in a stepped structure.

[0010] Further, an arc-shaped transition groove is provided between the limiting twist feet and the twist foot clamping positions.

[0011] Further, the height difference between two adjacent twist foot clamping positions is 0.5 mm.

[0012] Further, the three twist foot clamping positions are designed according to the level of the pressure between the iron frame and the PCB board from tight to loose. The design initial value is based on the middle twist foot clamping position. When the tightening force between the iron frame and the PCB board is relatively large, the bottom twist foot clamping position is used to fix the PCB board. When the tightening force between the iron frame and the PCB board is relatively small, the top twist foot clamping position is used to fix the PCB board.

[0013] Further, the LCD screen includes a polarizer, an upper glass sheet, a lower glass sheet and a lower polarizer which are connected in sequence.

[0014] Further, the copper exposed area is electrically connected to GND.

[0015] Further, a compression foam is provided between the iron frame and the LCD screen.

[0016] Further, the copper exposed area gradually inclines and thins towards the mounting hole, and is gradually pressed when the limiting twist feet penetrate through the mounting holes and contact the copper exposed area.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The liquid crystal display module provided by the present utility model designs the contact position between the limiting twisted feet of the iron frame and the copper-exposed area of the PCB board as three-step twisted foot clamping positions, and designs the three twisted foot clamping positions according to the level of the pressure between the iron frame and the PCB board from tight to loose. The initial value of the module design is based on the middle twisted foot clamping position. When the tightening force between the iron frame and the PCB board is too large, the lowermost twisted foot clamping position is used to fix the PCB board. When the tightening force between the iron frame and the PCB board is too small, the uppermost twisted foot clamping position is used to fix the PCB board, thereby improving the connection and conduction performance of the conductive rubber strip with the LCD screen and the PCB board. Even if there are tolerances during production, stable conduction can be achieved. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of an existing liquid crystal display module;

[0020] Figure 2 is a schematic cross-sectional structural diagram of an existing liquid crystal display module;

[0021] Figure 3 is a schematic cross-sectional structural diagram of the liquid crystal display module provided by the present utility model;

[0022] Figure 4 is an installation schematic diagram of the limiting twisted feet of the liquid crystal display module provided by the present utility model;

[0023] Figure 5 is of the liquid crystal display module provided by the present utility model Figure 4 magnified schematic diagram of part A;

[0024] Figure 6 is a schematic cross-sectional diagram of the LCD screen of the liquid crystal display module provided by the present utility model;

[0025] Figure 7 is a schematic structural diagram of the PCB board of the liquid crystal display module provided by the present utility model;

[0026] Figure 8 is a schematic structural diagram of the copper-exposed area of the liquid crystal display module provided by the present utility model being inclined.

[0027] The markings in the figures are described as follows:

[0028] 1. Iron frame; 2. LCD screen; 3. Backlight; 4. Limiting twisted feet; 5. PCB board; 6. Mounting holes; 7. Copper-exposed area; 8. Conductive rubber strip; 9. Twisted foot clamping position; 10. Transition groove; 11. Compressed foam; 201. Upper polarizer; 202. Upper glass sheet; 203. Lower glass sheet; 204. Lower polarizer. Detailed Embodiment

[0029] To enable those skilled in the art to better understand the solution of the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] As described in the background art, in the existing liquid crystal display module, the conductive rubber strip between the LCD screen and the PCB board is pressed by an iron frame. Due to the tolerance problem in the production and manufacturing of materials, it is very difficult for the conductive rubber strip to make the LCD screen and the PCB board in stable contact.

[0031] To solve this technical problem, the present utility model provides a liquid crystal display module. By designing the contact position between the limiting torsion feet of the iron frame and the copper-exposed area of the PCB board as a torsion foot clamping position with three steps, stable conduction can be achieved even if there is a tolerance during production and manufacturing.

[0032] Specifically, please refer to Figure 2-8 , the liquid crystal display module specifically includes:

[0033] An iron frame 1, an LCD screen 2 and a backlight 3. The LCD screen 2 and the backlight 3 are installed inside the iron frame 1. A plurality of limiting torsion feet 4 are fixedly connected to the right side of the iron frame 1;

[0034] A PCB board 5. A plurality of mounting holes 6 are provided on the PCB board 5, and a copper-exposed area 7 is arranged at the edge of the mounting hole 6;

[0035] A conductive rubber strip 8. The conductive rubber strip 8 is located between the LCD screen 2 and the PCB board 5. The limiting torsion feet 4 penetrate through the mounting holes 6 and contact and press the copper-exposed area 7, and the conductive rubber strip 8 is used to realize the signal connection and conduction between the LCD screen 2 and the PCB board 5.

[0036] For the liquid crystal display module provided by the present utility model, place the metal iron frame 1 on the workbench. The LCD screen 2 has been assembled in advance. Turn the metal iron frame 1 upwards, then place the LCD screen 2 and the backlight 3 into the iron frame 1. The LCD screen 2 faces downwards and aligns with the rectangular window of the iron frame 1. Then place the conductive rubber strip 8 on both sides of the backlight 3. Extend the wiring and FPC lines of the LCD screen 2 to the outside through the wiring opening. Then install the PCB board 5 on the upper side of the iron frame 1. At this time, the limiting torsion feet 4 on the upper side of the iron frame 1 pass through the mounting holes 6, and twist the limiting torsion feet 4 by an external force so that the limiting torsion feet 4 are twisted to the back of the PCB board 5, generating an extrusion effect on the iron frame 1, thereby completing the overall installation and enabling the conductive rubber strip 8 to contact the LCD screen 2 and the PCB board 5 to achieve communication.

[0037] To enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings.

[0038] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments can be combined with each other.

[0039] It should be noted that similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0040] Embodiment 1

[0041] Please refer to Figure 2-8 , a liquid crystal display module, which includes an iron frame 1, an LCD screen 2 and a backlight 3. The LCD screen 2 and the backlight 3 are installed inside the iron frame 1. A plurality of limiting torsion feet 4 are fixedly connected to the right side of the iron frame 1;

[0042] A PCB board 5, on which a plurality of mounting holes 6 are opened, and a copper exposed area 7 is arranged at the edge of the mounting hole 6;

[0043] A conductive rubber strip 8, the conductive rubber strip 8 is located between the LCD screen 2 and the PCB board 5. The limiting torsion feet 4 penetrate through the mounting holes 6 and contact and press the copper exposed area 7 to press the conductive rubber strip 8. The conductive rubber strip 8 is used to realize the signal connection and conduction between the LCD screen 2 and the PCB board 5. There are a total of eight limiting torsion feet 4 on the iron frame 1, two in a group, and they are respectively arranged on the two short sides and two long sides of the rectangular iron frame 1. The limiting torsion feet 4 are L-shaped metal sheets integrated with the rectangular iron frame 1.

[0044] Please refer to Figure 2-8 , place the metal iron frame 1 on the workbench. The LCD screen 2 has been pre-assembled. Turn the metal iron frame 1 upwards, then place the LCD screen 2 and the backlight 3 into the iron frame 1. The LCD screen 2 faces downwards and aligns with the rectangular window of the iron frame 1. Then place the conductive rubber strip 8 on both sides of the backlight 3. Extend the flexible cable and FPC cable of the LCD screen 2 to the outside through the wiring opening. Then install the PCB board 5 on the upper side of the iron frame 1. At this time, the limiting torsion feet 4 on the upper side of the iron frame 1 pass through the mounting holes 6, and twist the limiting torsion feet 4 with an external force, so that the limiting torsion feet 4 are twisted to the back of the PCB board 5, generating an extrusion effect on the iron frame 1, thereby completing the overall installation and making the conductive rubber strip 8 contact the LCD screen 2 and the PCB board 5 to realize communication.

[0045] Embodiment 2

[0046] Further optimize the liquid crystal display module provided in Embodiment 1. Specifically, as Figure 3 and Figure 4As shown in the figure, a plurality of twist foot clamping positions 9 are provided at the contact position between the limiting twist foot 4 and the copper exposed area 7. The plurality of twist foot clamping positions 9 are designed according to the level of the pressure between the iron frame 1 and the PCB board 5 from tight to loose. The initial value of the module design is based on the middle twist foot clamping position 9. When the tightening force between the iron frame 1 and the PCB board 5 is too large, the lower twist foot clamping position 9 is used to fix the PCB board 5. When the tightening force between the iron frame 1 and the PCB board 5 is too small, the upper twist foot clamping position 9 is used to fix the PCB board 5, thereby improving the connection and conduction performance of the conductive rubber strip 8 with the LCD screen 2 and the PCB board 5. Even if there are tolerances during production, stable conduction can be achieved;

[0047] As Figure 4 shown, the number of twist foot clamping positions 9 is three. The three twist foot clamping positions 9 are in a stepped structure, and the height difference between adjacent two twist foot clamping positions 9 is 0.5 mm.

[0048] Through the above structural design, due to the increase in the twist foot clamping positions 9, the length of the mounting hole 6 needs to be appropriately increased to ensure sufficient movement space for the copper exposed area 7 to contact different twist foot clamping positions 9.

[0049] Embodiment 3

[0050] Further optimize the liquid crystal display module provided in Embodiment 1 or 2. As Figure 4 and Figure 5 shown, an arc-shaped transition groove 10 is provided between the limiting twist foot 4 and the twist foot clamping position 9. The three twist foot clamping positions 9 are designed according to the level of the pressure between the iron frame 1 and the PCB board 5 from tight to loose. The initial design value is based on the middle twist foot clamping position 9. When the tightening force between the iron frame 1 and the PCB board 5 is too large, the bottom twist foot clamping position 9 is used to fix the PCB board 5. When the tightening force between the iron frame 1 and the PCB board 5 is too small, the top twist foot clamping position 9 is used to fix the PCB board 5.

[0051] Such a setting of the transition groove 10 can prevent excessive stress and damage between the twist foot clamping position 9 and the limiting twist foot 4 when stressed, improve the service life, prevent burr scratches during the processing from affecting the LCD screen 2, and also facilitate reducing the twisting difficulty of the limiting twist foot 4.

[0052] Embodiment 4

[0053] Further optimize the liquid crystal display module provided in the above embodiments. As Figure 3 and Figure 6 shown, the LCD screen 2 includes a polarizer 201, an upper glass sheet 202, a lower glass sheet 203, and a lower polarizer 204 connected in sequence. The copper exposed area 7 is electrically connected to the GND, so that the iron frame 1 can be indirectly electrically connected to the GND without using a wire for separate connection, which is more convenient;

[0054] A compression foam 11 is provided between the iron frame 1 and the LCD screen 2. This setting prevents the LCD screen 2 from being pressed against the iron frame 1 and damaged or affecting the display effect of the LCD screen 2 after the iron frame 1 and the PCB board 5 are tightened.

[0055] Embodiment 5

[0056] Further optimization of the liquid crystal display module provided in the above embodiments is as follows Figure 4 and Figure 8 As shown, the copper exposed area 7 gradually slopes and thins towards the mounting hole 6, and the limiting torsion foot 4 is gradually pressed when it passes through the mounting hole 6 and contacts the copper exposed area 7.

[0057] With such a structural design, when the limiting torsion foot 4 on the upper side of the iron frame 1 passes through the mounting hole 6, the limiting torsion foot 4 is twisted by an external force so that the limiting torsion foot 4 is twisted to the back of the PCB board 5. Since the copper exposed area 7 gradually slopes and thins towards the mounting hole 6, it can gradually exert an extrusion effect on the iron frame 1, and better make the conductive rubber strip 8 contact the LCD screen 2 and the PCB board 5 to achieve communication.

[0058] The usage process of the liquid crystal display module provided by the present utility model is as follows:

[0059] Place the metal iron frame 1 on the workbench. The LCD screen 2 has been assembled in advance. Place the metal iron frame 1 upwards, then place the LCD screen 2 and the backlight 3 into the iron frame 1. The LCD screen 2 faces downwards and aligns with the rectangular window of the iron frame 1. Then place the conductive rubber strip 8 on both sides of the backlight 3. Extend the wiring and FPC lines of the LCD screen 2 to the outside through the wiring opening. Then install the PCB board 5 on the upper side of the iron frame 1. At this time, the limiting torsion foot 4 on the upper side of the iron frame 1 passes through the mounting hole 6, and the limiting torsion foot 4 is twisted by an external force so that the limiting torsion foot 4 is twisted to the back of the PCB board 5, exerting an extrusion effect on the iron frame 1, thereby completing the overall installation, making the conductive rubber strip 8 contact the LCD screen 2 and the PCB board 5 to achieve communication. Since the contact position between the limiting torsion foot 4 of the iron frame 1 and the copper exposed area 7 of the PCB board 5 is designed as three-step torsion foot clamping positions 9, the three torsion foot clamping positions 9 are designed according to the level of the pressure between the iron frame 1 and the PCB board 5 from tight to loose. The initial value of the module design is based on the middle torsion foot clamping position 9. When the tightening force between the iron frame 1 and the PCB board 5 is too large, use the lowermost torsion foot clamping position 9 to fix the PCB board 5. When the tightening force between the iron frame 1 and the PCB board 5 is too small, use the uppermost torsion foot clamping position 9 to fix the PCB board 5, thereby improving the connection and conduction performance between the conductive rubber strip 8, the LCD screen 2 and the PCB board 5, and enabling stable conduction even if there are tolerances during production.

[0060] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0061] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of the embodiments. The accompanying drawings show the preferred embodiments of the present utility model, but do not limit the patent scope of the present utility model. The present utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosed content of the present utility model more thorough and comprehensive. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements on some of the technical features. Any equivalent structures directly or indirectly using the content of the specification and drawings of the present utility model in other related technical fields are equally within the scope of the patent protection of the present utility model.

Claims

1. A liquid crystal display module, characterized in that: It includes: An iron frame (1), an LCD screen (2) and a backlight (3), wherein the LCD screen (2) and the backlight (3) are installed inside the iron frame (1), and a plurality of limit twist feet (4) are fixedly connected to the right side of the iron frame (1); A PCB board (5), wherein a plurality of mounting holes (6) are formed on the PCB board (5), and edges of the mounting holes (6) are provided with exposed copper areas (7); A conductive rubber strip (8) is located between the LCD screen (2) and the PCB board (5); the limit twist foot (4) passes through the mounting hole (6) and contacts the exposed copper area (7) to press the conductive rubber strip (8); the conductive rubber strip (8) is used to achieve signal connection and conduction between the LCD screen (2) and the PCB board (5).

2. The liquid crystal display module according to claim 1, characterized in that: A plurality of twist foot clamping positions (9) are provided at the contact position between the limit twist foot (4) and the copper exposed area (7).

3. The liquid crystal display module according to claim 2, characterized in that: The number of the twist foot clamping positions (9) is three, and the three twist foot clamping positions (9) are in a stepped structure.

4. The liquid crystal display module according to claim 2, characterized in that: An arc-shaped transition groove (10) is provided between the limit twist foot (4) and the twist foot clamp (9).

5. The liquid crystal display module according to claim 3, characterized in that: The height difference between two adjacent twist foot positions (9) is 0.5 mm.

6. The liquid crystal display module according to claim 3, characterized in that: The three twisting foot positions (9) are designed according to the pressure between the iron frame (1) and the PCB board (5) from tight to loose, and the initial design value is based on the middle twisting foot position (9). When the tightening force between the iron frame (1) and the PCB board (5) is too large, the bottom twisting foot position (9) and the PCB board (5) are used to fix the operation. When the tightening force between the iron frame (1) and the PCB board (5) is too small, the top twisting foot position (9) and the PCB board (5) are used to fix the operation.

7. The liquid crystal display module according to claim 1, characterized in that: The LCD screen (2) comprises an upper polarizer (201), an upper glass (202), a lower glass (203) and a lower polarizer (204) which are connected in sequence.

8. The liquid crystal display module according to claim 7, characterized in that: The copper exposed area (7) is conductively connected to GND.

9. The liquid crystal display module according to claim 8, characterized in that: Compressed foam (11) is arranged between the iron frame (1) and the LCD screen (2).

10. The liquid crystal display module according to claim 1, characterized in that: The exposed copper area (7) gradually tilts and becomes thinner towards the mounting hole (6), and the limiting twist foot (4) gradually presses when it contacts the exposed copper area (7) after passing through the mounting hole (6).

Images