Liquid crystal display module for improving EMC static electricity

Abstract

The utility model discloses a liquid crystal display module capable of improving EMC static electricity, which comprises a cover plate, a display screen and a backlight module, and the display screen is provided with first protective paper and second protective paper which are used for connecting the display screen and the backlight module to improve EMC static electricity. One part of the first protective paper and one part of the second protective paper are attached to the display screen, and the other part of the first protective paper and the other part of the second protective paper are bent and then attached to the backlight module. The display module has the effect that static electricity accumulated on the surface of the display screen is conducted to the rear iron frame to be released, so that abnormal display of the display screen is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of display modules, in particular to a liquid crystal display module for improving EMC static electricity. Background Art

[0002] Liquid crystal display devices are widely used in various information, communication and consumer electronic products. The liquid crystal display module is mainly composed of a liquid crystal display screen and a backlight module. 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.

[0003] The EMC performance of the LCD display module in the prior art is closely related to the driver chip. Some driver chips with good EMC performance can work normally under severe electromagnetic interference, but some chips with poor performance will be greatly interfered by the external electromagnetic environment. Under external electromagnetic interference, the display screen may flicker, freeze, restart or even be damaged. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a liquid crystal display module with improved EMC static electricity.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A liquid crystal display module for improving EMC static electricity comprises: a cover plate, a display screen and a backlight module, wherein a first protective paper and a second protective paper for connecting the display screen and the backlight module to improve EMC static electricity are arranged on the display screen, a part of the first protective paper and the second protective paper are attached to the display screen, and another part of the first protective paper and the second protective paper are bent and attached to 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, the frame of the backlight module includes a middle plastic frame and a rear iron frame, and the display screen is accommodated in the middle plastic frame.

[0008] In one embodiment, one side of the first protective paper is aligned with the right edge of the upper polarizer and affixed to the surface of the display screen, and one side of the second protective paper is aligned with the lower edge of the upper polarizer and affixed to the surface of the display screen.

[0009] In one embodiment, the first protective paper and the second protective paper both include a black aluminum foil Mylar tape and a PET protective paper arranged on one side of the black aluminum foil Mylar tape, the surface of the black aluminum foil Mylar tape is black and insulating, non-sticky and non-conductive, and the side of the black aluminum foil Mylar tape facing the PET protective paper is sticky and conductive.

[0010] In one embodiment, the PET protective paper includes an attaching portion and a bending portion, and a half-punching line for separation is provided between the attaching portion and the bending portion.

[0011] In one embodiment, a tear handle is extended outwardly from one side of the bent portion.

[0012] In one embodiment, the attached portion of the PET protective paper on the first protective paper is torn off along the half-printed line, aligned with the right edge of the upper polarizer and attached to the upper glass, and the bent portion of the first protective paper is torn off along the half-printed line, bent and attached to the back of the rear iron frame.

[0013] In one embodiment, the attached portion of the PET protective paper on the second protective paper is torn off along the half-printed line, aligned with the lower edge of the upper polarizer and attached to the surface of the upper glass and the lower glass, and the bent portion on the second protective paper is torn off along the half-printed line, bent and attached to the back of the rear iron frame.

[0014] In one embodiment, an FPC is bound to the display screen, one end of the FPC is bound to the display screen, the other end of the FPC is bent and attached to the back of the rear iron frame, and a ground leakage copper block is provided on the surface of the FPC.

[0015] In one embodiment, there are three second protective papers, one side of each of which is aligned with the lower edge of the upper polarizer and attached to the surface of the display screen, and the second protective paper in the middle covers the ground leakage copper block of the FPC.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] The utility model discloses a liquid crystal display module for improving EMC static electricity, wherein a first protective paper and a second protective paper are provided to connect a display screen and a rear iron frame. When static electricity accumulates on the surface of the display screen, the static electricity charge is conducted to the FPC and the rear iron frame through the black aluminum foil Mylar tape, so as to improve the EMC static electricity and reduce the conduction of static electricity charge to the display screen, resulting in display abnormalities such as screen flickering, screen distortion and freeze. 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 1 A schematic diagram of the side cross-sectional structure of a liquid crystal display module for improving EMC static electricity provided by the utility model;

[0020] Figure 2 A schematic diagram of the front structure of a display screen in a liquid crystal display module for improving EMC static electricity provided by the utility model;

[0021] Figure 3 A schematic diagram of the back structure of a display screen in a liquid crystal display module for improving EMC static electricity provided by the utility model;

[0022] Figure 4 A schematic diagram of the structure of a first protective paper and a second protective paper in a liquid crystal display module for improving EMC static electricity provided by the utility model;

[0023] Figure 5 The utility model provides a back structural schematic diagram of a liquid crystal display module for improving EMC static electricity.

[0024] Description of the drawings: 10, cover plate; 20, display screen; 21, upper polarizer; 22, upper glass; 23, lower glass; 24, lower polarizer; 25, FPC; 251, ground leakage copper block; 30, backlight module; 31, middle plastic frame; 32, rear iron frame; 40, RTV structural hot melt adhesive; 50, first protective paper; 60, second protective paper; 70, black aluminum foil Mylar tape; 80, PET protective paper; 81, attachment part; 82, bending part; 821, tear handle; 90, half-printing line. DETAILED DESCRIPTION

[0025] 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.

[0026] A liquid crystal display module for improving EMC static electricity, referring to Figure 1 , including a cover plate 10, a display screen 20 and a backlight module 30, wherein the cover plate 10 is disposed on the surface of the display screen 20, the cover plate 10 and the display screen 20 are bonded and fixed by solid optical adhesive, the display screen 20 is accommodated in the backlight module 30, and the display screen 20 and the backlight module 30 are assembled by an assembly fixture. The size of the cover plate 10 is larger than that of the backlight module 30, and the side of the cover plate 10 facing the backlight module 30 contacts the end surface of the backlight module 30.

[0027] Reference Figure 1The connection between the backlight module 30 and the cover plate 10 is coated with RTV structural hot melt adhesive 40, and the RTV structural hot melt adhesive 40 is coated between the cover plate 10 and the backlight module 30 along the outer circle of the backlight module 30 to improve the reliability of the display module.

[0028] Reference Figure 1 The display screen 20 includes an upper polarizer 21, an upper glass 22, a lower glass 23 and a lower polarizer 24 arranged in sequence. The frame of the backlight module 30 includes a middle plastic frame 31 and a rear iron frame 32. The middle plastic frame 31 is hollow and the rear iron frame 32 is open on one side. The middle plastic frame 31 and the rear iron frame 32 are assembled and fixed so that the display screen 20 can be accommodated in the middle plastic frame 31. The backlight module 30 also includes a light-emitting component and a light-guiding part.

[0029] Reference Figure 2 The display screen 20 is provided with a first protective paper 50 and a second protective paper 60 for connecting the display screen 20 and the backlight module 30 to improve EMC static electricity. One side of the first protective paper 50 is aligned with the right edge of the upper polarizer 21 and attached to the surface of the display screen 20, and one side of the second protective paper 60 is aligned with the lower edge of the upper polarizer 21 and attached to the surface of the display screen 20.

[0030] Reference Figure 3 and Figure 4 The first protective paper 50 and the second protective paper 60 both include a black aluminum foil Mylar tape 70 and a PET protective paper 80 arranged on one side of the black aluminum foil Mylar tape 70, wherein the surface of the black aluminum foil Mylar tape 70 is a black insulating setting, which is non-sticky and non-conductive, and the side of the black aluminum foil Mylar tape 70 facing the PET protective paper 80 is sticky and conductive.

[0031] Reference Figure 4 The PET protective paper 80 includes an attachment portion 81 and a bending portion 82, and a half-printed line 90 for separation is provided between the attachment portion 81 and the bending portion 82. A tear handle 821 extends outward from one side of the bending portion 82 of the PET protective paper 80, and the tear handle 821 is used to facilitate tearing off the bending portion 82.

[0032] Among them, refer to Figure 2 and Figure 5 The attached portion 81 of the PET protective paper 80 on the first protective paper 50 is torn off along the half-printed line 90, and is aligned with the right edge of the upper polarizer 21 and attached to the upper glass 22 of the display screen 20. The bent portion 82 of the first protective paper 50 is torn off along the half-printed line 90 by the tear handle 821, and is attached to the back of the rear iron frame 32 after being bent.

[0033] Reference Figure 2 and Figure 5The attached portion 81 of the PET protective paper 80 on the two second protective papers 60 is torn off along the half-printed line 90, and the lower edge of the upper polarizer 21 is aligned and attached to the surface of the upper glass 22 and the lower glass 23 on the display screen 20. The bent portion 82 of the PET protective paper 80 on the two second protective papers 60 is torn off along the half-printed line 90 through the tear handle 821, and is attached to the back of the rear iron frame 32 after bending.

[0034] Further, refer to Figure 5 , the display screen 20 is bound with FPC25, which is bound to the lower glass 23, and two second protective papers 60 are respectively located on the left and right sides of FPC25. A ground leakage copper block 251 is provided on the surface of FPC25, one end of FPC25 is bound to the display screen 20, and the other end of FPC25 is bent and attached to the back of the rear iron frame 32. There are three second protective papers 60, and one side of the three second protective papers 60 is aligned with the lower edge of the upper polarizer 21 and attached to the surface of the display screen 20, and the second protective paper 60 located in the middle covers the ground leakage copper block of FPC25.

[0035] Reference Figure 5 By setting the first protective paper 50 and the second protective paper 60 to connect the display screen 20 and the rear iron frame 32, when static electricity accumulates on the surface of the display screen 20, the static electricity will be conducted to the FPC 25 and the rear iron frame 32 through the black aluminum foil Mylar tape 70 to improve EMC static electricity and reduce the conduction of static electricity to the display screen 20, resulting in display abnormalities such as screen flickering, screen flowering and freezing.

[0036] 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 liquid crystal display module for improving EMC static electricity, characterized in that: include: A cover plate (10), a display screen (20) and a backlight module (30); the display screen (20) is provided with a first protective paper (50) and a second protective paper (60) for connecting the display screen (20) and the backlight module (30) to improve EMC static electricity; a portion of the first protective paper (50) and the second protective paper (60) are attached to the display screen (20); another portion of the first protective paper (50) and the second protective paper (60) are bent and attached to the backlight module (30).

2. The liquid crystal display module for improving EMC static electricity according to claim 1, characterized in that: The display screen (20) comprises an upper polarizer (21), an upper layer of glass (22), a lower layer of glass (23) and a lower polarizer (24) which are arranged in sequence; the frame of the backlight module (30) comprises a middle plastic frame (31) and a rear iron frame (32); the display screen (20) is accommodated in the middle plastic frame (31).

3. The liquid crystal display module for improving EMC static electricity according to claim 2, characterized in that: One side of the first protective paper (50) is aligned with the right edge of the upper polarizer (21) and is affixed to the surface of the display screen (20), and one side of the second protective paper (60) is aligned with the lower edge of the upper polarizer (21) and is affixed to the surface of the display screen (20).

4. The liquid crystal display module for improving EMC static electricity according to claim 3, characterized in that: The first protective paper (50) and the second protective paper (60) both comprise a black aluminum foil Mylar tape (70) and a PET protective paper (80) arranged on one side of the black aluminum foil Mylar tape (70); the surface of the black aluminum foil Mylar tape (70) is black and insulating, non-sticky and non-conductive, and the side of the black aluminum foil Mylar tape (70) facing the PET protective paper (80) is sticky and conductive.

5. The liquid crystal display module for improving EMC static electricity according to claim 4, characterized in that: The PET protective paper (80) comprises an attaching portion (81) and a bending portion (82), and a half-printing line (90) for separation is provided between the attaching portion (81) and the bending portion (82).

6. The liquid crystal display module for improving EMC static electricity according to claim 5, characterized in that: A tear handle (821) extends outward from one side of the bent portion (82).

7. The liquid crystal display module for improving EMC static electricity according to claim 6, characterized in that: The attached portion (81) of the PET protective paper (80) on the first protective paper (50) is torn off along the half-printed line (90), aligned with the right edge of the upper polarizer (21) and attached to the upper glass (22); the bent portion (82) of the first protective paper (50) is torn off along the half-printed line (90), bent and attached to the back of the rear iron frame (32).

8. The liquid crystal display module for improving EMC static electricity according to claim 6, characterized in that: The attached portion (81) of the PET protective paper (80) on the second protective paper (60) is torn off along the half-printed line (90), aligned with the lower edge of the upper polarizer (21) and attached to the surface of the upper glass (22) and the lower glass (23); the bent portion (82) on the second protective paper (60) is torn off along the half-printed line (90), bent and attached to the back of the rear iron frame (32).

9. The liquid crystal display module for improving EMC static electricity according to claim 8, characterized in that: The display screen (20) is bound with an FPC (25), one end of the FPC (25) is bound to the display screen (20), the other end of the FPC (25) is bent and attached to the back of the rear iron frame (32), and a ground leakage copper block (251) is arranged on the surface of the FPC (25).

10. The liquid crystal display module for improving EMC static electricity according to claim 9, characterized in that: There are three second protective papers (60), one side of each of the three second protective papers (60) is aligned with the lower edge of the upper polarizer (21) and attached to the surface of the display screen (20), and the second protective paper (60) located in the middle covers the ground leakage copper block (251) of the FPC (25).

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