Display module convenient for grounding connection of display screen and backlight
By setting up a conductive ITO film on the display screen and connecting it with the iron frame of the backlight module with a conductive foam double-sided adhesive and EMI shielding film, the problem of poor ground connection between the conductive ITO film and the backlight module is solved, and the electrostatic release efficiency is improved.
Patent Information
- Application Number
- CN202421055594.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-14
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-05-14
AI Technical Summary
In the prior art, the dot-coated silver paste ground connection between the conductive ITO film and the backlight module is prone to uneven point coating and poor contact, resulting in low electrostatic release efficiency.
By setting up a conductive ITO film on the display screen and connecting it to the iron frame of the backlight module, the ground connection is achieved by using the conductive foam double-sided adhesive and EMI shielding film, which avoids the method of spot-coating silver paste. The conductive foam double-sided surfaces are double-sided. The adhesive contacts the conductive ITO film to deduct static electricity, and the EMI shielding film conducts the static electricity to the iron frame to release.
A more stable electrostatic grounding connection is achieved, which improves the electrostatic release efficiency and avoids the problems of uneven spot coating and poor contact.
Smart Images
Figure CN222354180U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display modules, in particular to a display module which is convenient for grounding a display screen and a backlight. Background Art
[0002] Liquid crystal display devices are widely used in various information, communication and consumer electronic products. Liquid crystal display modules are mainly composed of liquid crystal display screens and backlight modules. The surface of the liquid crystal display screen is usually provided with a cover plate for protection. The cover plate provides hardness for the liquid crystal display screen. The backlight module provides light source for the liquid crystal display screen. The light source enters the liquid crystal display screen and displays various colors. For IPS display screens, in order to solve the problem of static sensitivity, it is necessary to coat a layer of conductive ITO film (indium tin oxide) on the upper glass of the display screen as a shielding layer (Shielding ITO), and conduct the conductive ITO film to the GND ground system by dotting silver paste to quickly release the static electricity in the display screen.
[0003] In the prior art, the silver paste of the conductive ITO needs to be applied from the conductive ITO film to the backlight module to achieve ground connection. However, the silver paste application method is prone to uneven application and poor contact, resulting in a certain failure rate of static electricity release in the display screen. Utility Model Content
[0004] The utility model aims to overcome the shortcomings of the prior art and provide a display module which is convenient for grounding the display screen and the backlight.
[0005] The purpose of this utility model is achieved through the following technical solutions:
[0006] A display module that facilitates grounding connection between a display screen and a backlight, comprising: a display screen and a backlight module arranged on one side of the display screen, the display screen being accommodated on the backlight module, the display screen being provided with a conductive ITO film for solving static electricity problems, the conductive ITO film being provided with a conductive foam double-sided adhesive, the conductive foam double-sided adhesive being provided with an EMI shielding film, one side of the EMI shielding film being attached to the back side of the backlight module, thereby realizing grounding connection between the conductive ITO film and the backlight module.
[0007] In one embodiment, the display screen includes an upper polarizer, an upper layer of glass, a lower layer of glass, and a lower polarizer arranged in sequence, and the conductive ITO film is attached to the upper surface of the upper layer of glass.
[0008] In one embodiment, the backlight module includes a plastic frame and an iron frame, the plastic frame surrounds the periphery of the iron frame, and the backlight module also includes an upper iron frame, the upper iron frame surrounds the outer side of the plastic frame, the upper end of the upper iron frame surrounds the outer edge of the display screen, and the upper end of the upper iron frame is flush with the upper edge of the display screen.
[0009] In one embodiment, the four side edges of the upper polarizer are all indented inward by 2 mm, and the area where the conductive ITO film exceeds the upper polarizer is an external leakage area.
[0010] In one embodiment, the conductive foam is double-sidedly adhered to the outer leakage area, and the conductive foam is double-sidedly adhered along a circle of the outer leakage area.
[0011] In one embodiment, the upper side of the double-sided adhesive of the conductive foam is flush with the upper surface of the upper iron frame.
[0012] In one embodiment, the EMI shielding film includes an attachment portion and a bending portion, and the attachment portion and the bending portion are integrally formed.
[0013] In one embodiment, the attachment portion is attached along both sides of the conductive foam.
[0014] In one embodiment, four outer sides of the attachment portion extend outward to form the bending portion, and the bending portion is bent along the thickness of the backlight module and attached to the back side of the iron frame.
[0015] In one embodiment, an FPC is bound to the display screen, and the bending portion avoids the position of the FPC.
[0016] Compared with the prior art, the utility model has at least the following advantages:
[0017] The utility model discloses a display module which is convenient for grounding connection between a display screen and a backlight. By setting an EMI shielding film, the conductive foam is double-sidedly glued to an iron frame of the backlight module. The iron frame is connected to the GND network of the customer's mainboard, so that the EMI shielding film can achieve conduction between the conductive ITO film and the iron frame to achieve grounding connection, thereby eliminating the need to conduct the conductive ITO film and the iron frame by dot-coating silver paste. The conductive foam is double-sidedly glued to contact the conductive ITO film to conduct static electricity in the display screen, and the EMI shielding film conducts the static electricity to the iron frame for release. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.
[0019] Figure 1A schematic cross-sectional structure diagram of a display module provided by the utility model for facilitating ground connection between a display screen and a backlight;
[0020] Figure 2 A schematic diagram of a top view structure of a display module provided by the utility model for facilitating ground connection between a display screen and a backlight;
[0021] Figure 3 A schematic diagram of a structure of a conductive foam double-sided adhesive attached to an outer leakage area of a display module provided by the utility model for facilitating ground connection between a display screen and a backlight;
[0022] Figure 4 A schematic diagram of the structure of a conductive foam with an EMI shielding film attached to both sides in a display module provided by the utility model for facilitating grounding of a display screen and a backlight.
[0023] Description of the drawings: 10. Display screen; 11. Upper polarizer; 12. Upper glass; 13. Lower glass; 14. Lower polarizer; 15. FPC; 20. Backlight module; 21. Glue frame; 22. Iron frame; 23. Upper iron frame; 30. Conductive ITO film; 31. External leakage area; 40. Double-sided conductive foam; 50. EMI shielding film; 51. Attachment portion; 52. Bending portion. DETAILED DESCRIPTION
[0024] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.
[0025] A display module that facilitates ground connection between a display screen and a backlight, referring to Figure 1 , including a display screen 10 and a backlight module 20 disposed on one side of the display screen 10. The backlight module 20 is concave to form a receiving cavity for receiving the display screen 10, and the display screen 10 is received in the backlight module 20. The backlight module 20 includes a plastic frame 21 and an iron frame 22, the plastic frame 21 is hollow, the iron frame 22 is located on the inner side of the plastic frame 21, the plastic frame 21 surrounds the outer side of the iron frame 22, and the display screen 10 is located in the iron frame 22.
[0026] Reference Figure 1 In order to enhance the structural stability of the display screen 10 , the backlight module 20 further includes an upper iron frame 23 , which surrounds the outer side of the plastic frame 21 . The upper end of the upper iron frame 23 is folded inward to surround the outer edge of the display screen 10 , and the upper end of the upper iron frame 23 is flush with the upper edge of the display screen 10 .
[0027] Reference Figure 1The display screen 10 includes an upper polarizer 11, an upper glass 12, a lower glass 13 and a lower polarizer 14, which are arranged in sequence. The lower polarizer 14 is located on the side of the display screen 10 facing the backlight module 20. A conductive ITO film 30 is attached to the upper surface of the upper glass 12 to solve the problem of electrostatic sensitivity.
[0028] Reference Figure 1 and Figure 2 The four side edges of the upper polarizer 11 are all retracted inward by 2 mm, so that the conductive ITO film 30 on the upper glass 12 leaks out, and the range where the conductive ITO film 30 exceeds the upper polarizer 11 is the external leakage area 31.
[0029] Reference Figure 3 A conductive foam double-sided adhesive 40 is attached to the outer leakage area 31, and the conductive foam double-sided adhesive 40 is attached along the outer leakage area 31. The conductive foam double-sided adhesive 40 covers the position of the outer leakage area 31, and the conductive foam double-sided adhesive 40 plays a role of conducting electricity and preventing dust to guide the static electricity in the display screen 10.
[0030] Reference Figure 1 The upper side of the conductive foam double-sided adhesive 40 is flush with the upper surface of the upper iron frame 23, so that the height of the conductive foam double-sided adhesive 40 is horizontally arranged with the height of the upper iron frame 23, and the upper iron frame 23 surrounds the outer periphery of the conductive foam double-sided adhesive 40.
[0031] Reference Figure 4 , an EMI shielding film 50 for grounding the backlight module 20 is attached to the conductive foam double-sided adhesive 40, and the EMI shielding film 50 includes an attachment portion 51 and a bending portion 52, and the attachment portion 51 and the bending portion 52 are integrally formed. The attachment portion 51 is attached along the conductive foam double-sided adhesive 40 to connect with the conductive foam double-sided adhesive 40. The four outer sides of the attachment portion 51 extend outward to form a bending portion 52, and the bending portion 52 is bent along the thickness of the backlight module 20 and attached to the back of the iron frame 22. The conductive foam double-sided adhesive 40 supports the EMI shielding film 50 to prevent the EMI shielding film 50 from bending and wrinkling.
[0032] Reference Figure 1 , the EMI shielding film 50 is connected to the iron frame 22 of the backlight module 20 by connecting the conductive foam double-sided adhesive 40, and the iron frame 22 is connected to the GND network of the customer's mainboard, so that the EMI shielding film 50 can achieve the conductive ITO film 30 and the iron frame 22 to achieve ground connection, so that there is no need to achieve conductive connection between the conductive ITO film 30 and the iron frame 22 by dot-coating silver paste. The conductive foam double-sided adhesive 40 contacts the conductive ITO film 30 to guide the static electricity in the display screen 10, and the EMI shielding film 50 conducts the static electricity to the iron frame 22 for release.
[0033] Further, refer to Figure 4The display screen 10 is bound with FPC 15 , and the bending portion 52 of the EMI shielding film 50 is away from the position of the FPC 15 of the display screen 10 to prevent the EMI shielding film 50 from being attached to the FPC 15 .
[0034] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A display module that facilitates ground connection between a display screen and a backlight, characterized in that: include: A display screen (10) and a backlight module (20) arranged on one side of the display screen (10); the display screen (10) is accommodated on the backlight module (20); a conductive ITO film (30) for solving static electricity problems is arranged on the display screen (10); the conductive ITO film (30) is provided with a conductive foam double-sided adhesive (40); an EMI shielding film (50) is arranged on the conductive foam double-sided adhesive (40); one side of the EMI shielding film (50) is attached to the back side of the backlight module (20), so that the conductive ITO film (30) and the backlight module (20) are grounded.
2. A display module for facilitating ground connection between a display screen and a backlight according to claim 1, characterized in that: The display screen (10) comprises an upper polarizer (11), an upper layer of glass (12), a lower layer of glass (13) and a lower polarizer (14) which are arranged in sequence, and the conductive ITO film (30) is attached to the upper surface of the upper layer of glass (12).
3. A display module for facilitating ground connection between a display screen and a backlight according to claim 2, characterized in that: The backlight module (20) comprises a plastic frame (21) and an iron frame (22), wherein the plastic frame (21) surrounds the periphery of the iron frame (22), and the backlight module (20) further comprises an upper iron frame (23), wherein the upper iron frame (23) surrounds the outer side of the plastic frame (21), and the upper end of the upper iron frame (23) surrounds the outer edge of the display screen (10), and the upper end of the upper iron frame (23) is flush with the upper side edge of the display screen (10).
4. A display module for facilitating ground connection between a display screen and a backlight according to claim 3, characterized in that: The four side edges of the upper polarizer (11) are all retracted inward by 2 mm, and the area where the conductive ITO film (30) exceeds the upper polarizer (11) is an external leakage area (31).
5. A display module for facilitating ground connection between a display screen and a backlight according to claim 4, characterized in that: The conductive foam double-sided adhesive (40) is attached to the inside of the external leakage area (31), and the conductive foam double-sided adhesive (40) is attached along a circle of the external leakage area (31).
6. A display module for facilitating ground connection between a display screen and a backlight according to claim 5, characterized in that: The upper side of the conductive foam double-sided adhesive (40) is flush with the upper surface of the upper iron frame (23).
7. A display module for facilitating ground connection between a display screen and a backlight according to claim 6, characterized in that: The EMI shielding film (50) comprises an attaching portion (51) and a bending portion (52), and the attaching portion (51) and the bending portion (52) are integrally formed.
8. A display module for facilitating ground connection between a display screen and a backlight according to claim 7, characterized in that: The attachment portion (51) is attached along the double-sided adhesive (40) of the conductive foam in a circle.
9. A display module for facilitating ground connection between a display screen and a backlight according to claim 8, characterized in that: The four outer sides of the attachment portion (51) all extend outward to form the bending portion (52); the bending portion (52) is bent along the thickness of the backlight module (20) and attached to the back side of the iron frame (22).
10. A display module for facilitating ground connection between a display screen and a backlight according to claim 9, characterized in that: The display screen (10) is bound with an FPC (15), and the bending portion (52) avoids the position of the FPC (15).