CN110018584B

CN110018584B - Liquid crystal display module and electronic equipment

Info

Publication number: CN110018584B
Application number: CN201910266025.9A
Authority: CN
Inventors: 李鹏程; 陈湘娜
Original assignee: China Display Optoelectronics Technology Huizhou Co Ltd
Current assignee: China Display Optoelectronics Technology Huizhou Co Ltd
Priority date: 2019-04-03
Filing date: 2019-04-03
Publication date: 2023-07-11
Anticipated expiration: 2039-04-03
Also published as: CN110018584A

Abstract

The utility model provides a liquid crystal display module and electronic equipment, liquid crystal display module includes the liquid crystal display, main FPC and backlight unit, main FPC includes flexible main part, main FPC circuit and backlight FPC circuit, backlight unit includes light screen and backlight flexible circuit board, the light screen is connected to glass substrate down, main FPC circuit connection liquid crystal, two first copper leakage areas have on the glass substrate down, two first copper leakage areas are in the one side that is close to liquid crystal respectively the electrical connection backlight FPC circuit, the light screen area of light screen has two connecting holes, backlight flexible circuit board passes behind two connecting holes through two double-sided conductive adhesive tape one-to-one and one electrical connection two first copper leakage areas in the one side that keeps away from liquid crystal. Above-mentioned LCD module equipment convenience is better, can save the process of buckling flexible circuit board and welding, and because the double-sided conductive tape is adopted, the process of reprocessing is difficult for appearing the pad dirt in a poor light, can reduce extravagant and the loss of material.

Description

Liquid crystal display module and electronic equipment

Technical Field

The present disclosure relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display module and an electronic device.

Background

The liquid crystal display module (LCD module) includes a liquid crystal screen (Liquid Crystal Display, LCD), a backlight source, and the like. Backlight (backlight) is an indispensable component of a liquid crystal display module (LCD module). The liquid crystal panel, i.e. the liquid crystal display, is itself non-emissive. The backlight provides a uniform light source through the conduction (refraction and reflection) of the light guide plate and the optical film inside the backlight by a plurality of groups of side-emitting LEDs which are transversely arranged, and the patterns are displayed through the screening of the liquid crystal screen. The liquid crystal display module is mainly applied to products such as mobile phones, notebook computers, PDAs, digital cameras and the like.

However, in the existing assembly process of the liquid crystal display module, the assembly process of the liquid crystal display and the backlight is mainly a complicated connection process of the circuit. The circuit of the backlight of the mobile phone is often not directly connected with the liquid crystal, the backlight and the LCD are structurally attached together through black and white glue, and the circuit of the LED of the backlight is LED out through an FPC (Flexible Printed Circuit, flexible circuit board) to be welded on a main FPC of the liquid crystal. Thus, the conventional process of assembling a backlight and a liquid crystal is as follows: firstly, connecting a circuit on a main FPC to liquid crystal through anisotropic conductive adhesive, then fixing backlight on the back of the liquid crystal through black-and-white adhesive, bending the circuit FPC of the backlight to the front, and finally welding the circuit of the backlight and the circuit of the main FPC of the liquid crystal. The traditional assembly process wastes a lot of processes for connecting the circuit of the backlight, has low automation degree, needs more manual operation posts, such as the need of manually bending the flexible circuit board of the backlight and leading to the main FPC of the liquid crystal, and needs manual welding and the like. If backlight or liquid crystal is problematic, repeated repair can lead to dirt on the backlight bonding pad, poor welding is easy, and labor and materials are wasted. And the assembly process with high requirement on manual operation is unfavorable for automatic production.

Disclosure of Invention

Accordingly, it is necessary to provide a liquid crystal display module and an electronic device which are convenient in assembly process and capable of reducing loss during repair.

The utility model provides a liquid crystal display module, includes liquid crystal display, main FPC and backlight unit, the liquid crystal display includes glass substrate, liquid crystal and the lower glass substrate that are connected, main FPC includes flexible main part, main FPC circuit and backlight FPC circuit, backlight unit includes light screen and backlight flexible circuit board, including the shading district and the light transmission district that are connected on the light screen, the glass substrate is connected down the light screen, main FPC circuit connection liquid crystal, the glass substrate is kept away from down have two first copper leakage district in the one side of liquid crystal, two first copper leakage district is electric to be connected respectively backlight FPC circuit, the shading district has two connecting holes, two the connecting hole respectively with two first copper leakage district one-to-one, the flexible circuit board is passed two through two face conductive adhesive tape one-to-one behind the connecting hole and two first copper leakage district is connected to one electricity.

In one embodiment, the main FPC circuit is connected to the liquid crystal through anisotropic conductive adhesive.

In one embodiment, the two first copper leakage areas are aligned with the two connection holes one by one respectively.

In one embodiment, the area of the connection hole is larger than the area of the first copper leakage area.

In one embodiment, the shape of the connection hole is the same as the shape of the first copper leakage area.

Above-mentioned LCD module, during LCD screen and backlight unit equipment, directly can be with backlight unit's circuit connection to main FPC through two-sided conductive adhesive tape on, for traditional mode that needs to buckle and be connected to main FPC with backlight unit through flexible circuit board, above-mentioned LCD module equipment convenience is better, can save the flexible circuit board of buckling and welded process, and because the two-sided conductive adhesive tape of adoption, the process of repairing is difficult for appearing backlight pad dirty, can reduce material waste and loss.

The liquid crystal display module comprises a liquid crystal display screen, a main FPC and a backlight module, wherein the liquid crystal display screen comprises an upper glass substrate, liquid crystal and a lower glass substrate which are connected, the main FPC comprises a flexible main body, a main FPC circuit and a backlight FPC circuit, the backlight module comprises a light shielding plate and a backlight flexible circuit board, the light shielding plate comprises a light shielding area and a light transmission area which are connected, the lower glass substrate is connected with the light shielding plate, the main FPC circuit is connected with the liquid crystal, two first copper leakage areas are arranged on one side, close to the liquid crystal, of a protruding part of the lower glass substrate, opposite to the upper glass substrate, and the two first copper leakage areas are respectively positioned at two side edge positions of the upper glass substrate; the two first copper leakage areas are respectively and electrically connected with the backlight FPC circuit; two copper leakage bulges are arranged on the backlight flexible circuit board, are positioned on two sides of the lower glass substrate, and are adjacent to the first copper leakage areas in a one-to-one correspondence manner; and each copper leakage protrusion is electrically connected with each first copper leakage area in a one-to-one correspondence mode.

In one embodiment, each copper leakage protrusion is electrically connected to each first copper leakage area through a silver paste line in a one-to-one correspondence.

In one embodiment, the copper leakage protrusion protrudes from one surface of the lower glass substrate, which is close to the liquid crystal.

In one embodiment, the backlight flexible circuit board is provided with two second copper leakage areas, and each second copper leakage area is electrically connected with each copper leakage protrusion through a silver paste line in a one-to-one correspondence mode.

In one embodiment, the backlight module comprises a light shielding plate, an upper light enhancement sheet, a lower diffusion plate, a light guide plate, a reflecting sheet, a glue frame and a backlight flexible circuit board, wherein the light shielding plate, the upper light enhancement sheet, the lower diffusion plate, the light guide plate and the reflecting sheet are sequentially connected, the backlight flexible circuit board is connected with the glue frame, the reflecting sheet is connected with the glue frame, the light guide plate is accommodated in the glue frame, a plurality of LED lamp beads are arranged on the backlight flexible circuit board and are in alignment with the light guide plate, and the light emitting direction of the LED lamp beads faces the light guide plate.

Above-mentioned liquid crystal display module, liquid crystal display and backlight unit equipment time, direct through silver thick liquid line can be with leaking copper protruding and first copper district that leaks and be connected, for traditional mode that need buckle and be connected to main FPC with backlight unit through flexible circuit board, above-mentioned liquid crystal display module equipment convenience is better, can save the flexible circuit board of buckling and welded process, and because each leak copper protruding one-to-one is adjacent each first copper district that leaks, leak copper protruding and first copper district that leaks is connected through silver thick liquid line's electricity comparatively convenient, the difficult pad dirty that falls back to the light of the process of repairing appears, can reduce material waste and loss.

The application also provides electronic equipment comprising the liquid crystal display module in any embodiment.

Drawings

FIG. 1 is a schematic diagram of an LCD module according to an embodiment;

fig. 2 is a schematic diagram of a liquid crystal display module according to another embodiment.

Detailed Description

In order to facilitate understanding of the present application, the following detailed description of the specific embodiments of the present application will be described in connection with the accompanying drawings, so that the foregoing objects, features, and advantages of the present application will be more readily understood. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, the preferred embodiments of which are shown in the accompanying drawings. This application may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. This application is intended to be limited to the details of the particular embodiments disclosed herein since it is to be understood that modifications may be made by those skilled in the art without departing from the spirit of the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise. In the description of the present application, the meaning of "several" means at least one, such as one, two, etc., unless explicitly defined otherwise. It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

In an embodiment, referring to fig. 1, a liquid crystal display module includes a liquid crystal display 110, a main FPC and a backlight module 120, wherein the liquid crystal display 110 includes an upper glass substrate 111, a liquid crystal 112 and a lower glass substrate 113 which are connected, the main FPC includes a flexible main body, a main FPC circuit and a backlight FPC circuit, the backlight module 120 includes a light shielding plate 121 and a backlight flexible circuit board 122, the light shielding plate 121 includes a light transmitting area 1211 and a light shielding area 1212 which are connected, the light transmitting area 1211 is used for facilitating the light of backlight to pass through, and the light shielding area 1212 blocks the light. The lower glass substrate 113 is connected to the light shielding plate 121. Specifically, the light shielding plate comprises a diffusion sheet and a notch-shaped light shielding adhesive layer arranged on the diffusion sheet, the notch-shaped light shielding adhesive layer shields one surface of the diffusion sheet, which is close to the lower glass substrate, to form the light transmission area and the light shielding area, the light transmission area is a hollow part of the diffusion sheet, which is positioned on the notch-shaped light shielding adhesive layer, and the light shielding area is positioned on the diffusion sheet, which is shielded by the light shielding adhesive layer. For example, the mouth-shaped light-shielding glue layer has a mouth-shaped structure, or a "ζ" shaped structure, and for another example, the mouth-shaped light-shielding glue layer is a "ζ" shaped light-shielding glue layer, which is formed by coating and curing the diffusion sheet with the light-shielding glue. The main FPC circuit is connected to the liquid crystal 112, for example, the main FPC circuit is connected to the liquid crystal 112 through anisotropic conductive adhesive. For example, the main FPC is connected to a preset position of one side of the lower glass substrate, which is close to the liquid crystal, through anisotropic conductive adhesive and is connected with the liquid crystal. The lower glass substrate 113 has two first copper leakage areas 1131 on a surface far away from the liquid crystal 112, and it should be noted that the copper leakage areas are conductive areas formed on the lower glass substrate by copper. The two first copper leakage areas 1131 are respectively and electrically connected to the backlight FPC circuit, the light shielding area 1212 of the light shielding plate 121 has two connection holes 1212a, the two connection holes 1212a are respectively and respectively corresponding to the two first copper leakage areas 1131, the backlight flexible circuit board 122 passes through the two double-sided conductive tapes in a one-to-one correspondence manner and then electrically connects the two first copper leakage areas 1131 in a one-to-one correspondence manner, that is, each first copper leakage area is electrically connected to the backlight FPC circuit, for example, the backlight flexible circuit board 122 passes through the two double-sided conductive tapes in a one-to-one correspondence manner and electrically connects the two first copper leakage areas 1131 in a one-to-one correspondence manner, and each double-sided conductive tape passes through one connection hole. For another example, the positive and negative electrodes of the backlight flexible circuit board 122 are electrically connected to the two first copper leakage areas 1131 through two double-sided conductive tapes in a one-to-one correspondence. So, above-mentioned liquid crystal display module, when liquid crystal display 110 and backlight module 120 are assembled, directly can be with backlight module 120's circuit connection to main FPC through two-sided conductive adhesive tape, for traditional mode that needs to buckle and be connected to main FPC with backlight circuit through flexible circuit board, above-mentioned liquid crystal display module equipment convenience is better, can save the flexible circuit board of buckling and welded process, and because the two-sided conductive adhesive tape of adoption, the process of repairing is difficult for appearing backlight pad dirty, can reduce material waste and loss. For example, the two first copper leakage regions 1131 are aligned with the two connection holes 121 one by one, respectively. For example, the area of the connection hole 1212a is larger than the area of the first copper leakage 1131. For example, the shape of the connection hole 1212a is the same as the shape of the first copper leakage 1131. In this way, it is possible to better facilitate the electrical connection of the backlight flexible circuit board 122 to the backlight FPC circuit of the main FPC by the double-sided conductive tape.

It should be noted that, in this embodiment, please refer to the prior art for the connection of the liquid crystal and the anisotropic conductive adhesive, and the arrangement of the main FPC circuit and the backlight FPC circuit on the main FPC. In the present application, the backlight module is a side-in backlight module. In addition to the light shielding plate and other structures of the backlight flexible circuit board, please refer to the prior art. The application is mainly to improve the wiring mode of the main FPC of the existing liquid crystal display module and the circuit of the backlight flexible circuit board in the backlight module.

In this embodiment, the wiring of the backlight FPC line of the main FPC is led to the side of the liquid crystal display 110 close to the backlight module 120, that is, the backlight FPC line of the main FPC is led to the lower glass substrate 113 through the first copper leakage area 1131 of the lower glass substrate, and the backlight flexible circuit board 122 is electrically connected to the two first copper leakage areas 1131 on the side far away from the liquid crystal 112 through the two double-sided conductive tapes after penetrating through the two connecting holes 1212a in a one-to-one correspondence manner, so as to realize the connection between the backlight circuit and the main FPC. Compared with the traditional mode that the backlight circuit needs to be bent through the flexible circuit board and connected to the main FPC, the liquid crystal display module is good in assembly convenience, the process of bending the flexible circuit board and welding can be omitted, and the process of repairing is not easy to cause dirt of a backlight bonding pad due to the adoption of the double-sided conductive adhesive tape, so that material waste and loss can be reduced. It should be noted that, the backlight flexible circuit board of the backlight module has two access points, namely a positive access point and a negative access point, which can be also understood as a positive copper leakage area and a negative copper leakage area, and the positive copper leakage area and the negative copper leakage area are electrically connected with a first copper leakage area through a double-sided conductive adhesive tape respectively. Of course, how the main FPC is connected to the liquid crystal through the anisotropic conductive adhesive may also refer to the design of the prior art. In order to further explain the structure of backlight unit, for example, backlight unit includes light screen, upper light enhancement piece, lower diffuser plate, light guide plate, reflector plate, glues frame and backlight flexible circuit board, light screen, upper light enhancement piece, lower diffuser plate, light guide plate and reflector plate are connected in proper order, backlight flexible circuit board connects glue the frame, the reflector plate is connected glue the frame, just the light guide plate holding is in glue the frame, be provided with a plurality of LED lamp pearls on the flexible circuit board in a poor light, a plurality of LED lamp pearls are parallel with the light guide plate, and the light-emitting direction of LED lamp pearl orientation light guide plate. Of course, the structure of the backlight module can refer to other side-in type backlight modules.

The application also provides another embodiment to improve the wiring mode of the main FPC of the existing liquid crystal display module and the circuit of the backlight flexible circuit board in the backlight module again.

In an embodiment, please refer to fig. 2, a liquid crystal display module includes a liquid crystal display 110, a main FPC and a backlight module 120, the liquid crystal display 110 includes an upper glass substrate 111, a liquid crystal 120 and a lower glass substrate 113 connected to each other, one side of the lower glass substrate 113 protrudes from the upper glass substrate 111, the protruding portion on the lower glass substrate 113 has two first copper leakage areas 1131, and it should be noted that the copper leakage areas are conductive areas formed on the lower glass substrate by copper. Two first copper leakage regions 1131 are respectively located at two side positions of the upper glass substrate 110; the main FPC includes a flexible main body, a main FPC circuit and a backlight FPC circuit, the lower glass substrate 113 is connected to the light shielding plate 121, the main FPC circuit is connected to the liquid crystal 120, and the two first copper leakage areas 1131 are respectively electrically connected to the backlight FPC circuit; the backlight module 120 includes a light shielding plate 121 and a backlight flexible circuit board 122, the light shielding plate 121 includes a light transmitting area 1211 and a light shielding area 1212 connected to each other, and the backlight flexible circuit board 122 is located below the light shielding area 1212 of the light shielding plate 121. Specifically, the light shielding plate comprises a diffusion sheet and a notch-shaped light shielding adhesive layer arranged on the diffusion sheet, the notch-shaped light shielding adhesive layer shields one surface of the diffusion sheet, which is close to the lower glass substrate, to form the light transmission area and the light shielding area, the light transmission area is a hollow part of the diffusion sheet, which is positioned on the notch-shaped light shielding adhesive layer, and the light shielding area is positioned on the diffusion sheet, which is shielded by the light shielding adhesive layer. For example, the mouth-shaped light-shielding glue layer has a mouth-shaped structure, or a "ζ" shaped structure, and for another example, the mouth-shaped light-shielding glue layer is a "ζ" shaped light-shielding glue layer, which is formed by coating and curing the diffusion sheet with the light-shielding glue. For another example, the backlight flexible circuit board 122 is located below the diffusion sheet, specifically, the backlight flexible circuit board 122 is located below the diffusion sheet where the light shielding glue shields the light. The backlight flexible circuit board 122 is provided with two copper leakage protrusions 1221, the two copper leakage protrusions 1221 are located at two sides of the lower glass substrate 113, it may also be understood that two ends of the backlight flexible circuit board protrude from the lower glass substrate respectively, and the two copper leakage protrusions 1221 are disposed on protruding portions of the backlight flexible circuit board respectively. For example, two copper leakage protrusions 1221 are located at two sides of the protruding portion of the lower glass substrate with respect to the upper glass substrate, for example, two ends of the backlight flexible circuit board protrude from the protruding portion of the lower glass substrate, respectively, and two copper leakage protrusions 1221 are disposed on the protruding portion of the backlight flexible circuit board, respectively. Each copper leakage protrusion 1221 is adjacent to each first copper leakage region 1131 in a one-to-one correspondence; each of the copper leakage protrusions 1221 is electrically connected to each of the first copper leakage regions 1131 in a one-to-one correspondence. In this way, it is convenient to electrically connect the copper-leakage bump with the first copper-leakage region, for example, by a silver paste wire. In this embodiment, by introducing the circuit of the main FPC to the front surface of the liquid crystal display, that is, the display surface, specifically, since one side edge of the lower glass substrate protrudes from the upper glass substrate, the protruding portion of the lower glass substrate with respect to the upper glass substrate can also be regarded as the front surface of the liquid crystal display on the side close to the liquid crystal. The front and back sides of the liquid crystal display are opposite, the side of the liquid crystal display, which is close to the backlight, is the back side, and the side of the liquid crystal display, which is far away from the backlight, is the back side. And then, after the backlight module is attached to the liquid crystal display screen, the backlight circuit can be electrically connected with the main FPC through the silver paste wire. Thus, in the above-mentioned liquid crystal display module, when the liquid crystal display 110 and the backlight module 120 are assembled, the copper leakage protrusions 1221 and the first copper leakage areas 1131 can be electrically connected directly through the silver paste lines, compared with the traditional mode that the backlight circuit is required to be bent and connected to the main FPC through the flexible circuit board, the above-mentioned liquid crystal display module is convenient to assemble, the process of bending the flexible circuit board and welding can be omitted, and as each copper leakage protrusion 1221 is adjacent to each first copper leakage area 1131 in one-to-one correspondence, the copper leakage protrusions and the first copper leakage areas are electrically connected conveniently through the silver paste lines, the pollution of the backlight bonding pad is not easy to occur in the repairing process, and the material waste and loss can be reduced.

It should be noted that, in this embodiment, by introducing the backlight FPC circuit portion of the main FPC onto the front surface of the liquid crystal display 110, that is, the first copper leakage area 1131 of the upper glass substrate 111, then projecting the two ends of the backlight flexible circuit board 122 of the backlight module 120, and disposing the copper leakage protrusions 1221 thereon, the two copper leakage protrusions 1221 are located on two sides of the lower glass substrate 131, so that the electrical connection between the copper leakage protrusions 1221 and the first copper leakage area 1131 is relatively convenient. Preferably, the copper leakage protrusions 1221 are not lower than the side of the lower glass substrate 131 close to the liquid crystal 112. Thus, the electric connection between the copper leakage bulge and the first copper leakage area is facilitated. For example, each copper leakage protrusion is electrically connected to each first copper leakage area through a silver paste line in a one-to-one correspondence manner. For another example, the copper leakage protrusion protrudes from one surface of the lower glass substrate, which is close to the liquid crystal.

It should be noted that, the flexible circuit board in a poor light in this application makes the both sides of flexible circuit board in a poor light grow on the basis of traditional flexible circuit board in a poor light to set up copper leakage protruding 1221 above that, and then make things convenient for the electrical connection of back light circuit and main FPC. After the copper leakage protrusions 1221 are disposed, in order to facilitate connection of the original copper leakage protrusions 1221 with the LED driving circuit of the backlight flexible circuit board, for example, the LED driving circuit of the backlight flexible circuit board has two second copper leakage regions, each of which is electrically connected to each of the copper leakage protrusions through silver paste lines in one-to-one correspondence.

It should be noted again that, please refer to the prior art, how the liquid crystal and the main FPC circuit of the main FPC, and the arrangement of the main FPC circuit and the backlight FPC circuit on the main FPC are connected by the anisotropic conductive adhesive. In the present application, the backlight module is a side-in backlight module. In addition to the light shielding plate and other structures of the backlight flexible circuit board, please refer to the prior art. The application is mainly to improve the wiring mode of the main FPC of the existing liquid crystal display module and the circuit of the backlight flexible circuit board in the backlight module. For another example, the LED driving circuit of the backlight flexible circuit board of the backlight module is conducted through the anisotropic conductive adhesive. For another example, each circuit on the main FPC is also conducted through the anisotropic conductive adhesive. Of course, how the main FPC is connected to the driving IC of the liquid crystal may be referred to the design of the related art. In order to further explain the structure of backlight unit, for example, backlight unit includes light screen, upper light enhancement piece, lower diffuser plate, light guide plate, reflector plate, glues frame and backlight flexible circuit board, light screen, upper light enhancement piece, lower diffuser plate, light guide plate and reflector plate are connected in proper order, backlight flexible circuit board connects glue the frame, the reflector plate is connected glue the frame, just the light guide plate holding is in glue the frame, be provided with a plurality of LED lamp pearls on the flexible circuit board in a poor light, a plurality of LED lamp pearls are parallel with the light guide plate, and the light-emitting direction of LED lamp pearl orientation light guide plate. Of course, the structure of the backlight module can refer to other side-in type backlight modules.

Above-mentioned liquid crystal display module, liquid crystal display 110 and backlight module 120 when assembling, can directly be through silver thick liquid line with leak copper protruding 1221 and first copper district 1131 and electrically connect, for traditional mode that need buckle and be connected to main FPC with backlight circuit through flexible circuit board, above-mentioned liquid crystal display module equipment convenience is better, can save the flexible circuit board of buckling and welded process, and because each leak copper protruding 1221 one-to-one is adjacent each first copper district 1131 leaks, leak copper protruding and first copper district and are comparatively convenient through silver thick liquid line's electric connection, and the difficult pad dirt that appears in a poor light of the process of reprocessing can reduce material waste and loss.

The application also provides electronic equipment comprising the liquid crystal display module in any embodiment. For example, the electronic device is a product such as a mobile phone, a notebook computer, a Pad (tablet computer), a digital camera, etc.

It should be noted that, backlight (Back light) is an essential component of a liquid crystal display module (LCD module). An LCD (abbreviated as Liquid Crystal Display), known as a liquid crystal display, is itself non-emissive. The backlight provides a uniform light source through the conduction (refraction and reflection) of the light guide plate and the optical film inside the backlight by the group of side-emitting LEDs which are transversely arranged, and the liquid crystal is screened to obtain a desired pattern. The liquid crystal display module is mainly applied to products such as mobile phones, notebook computers, PDAs, digital cameras and the like.

However, the backlight and the LCD circuit of the conventional LCD module, such as the LCD module of a mobile phone, are often not directly linked together. In the structure, the LED backlight is bonded together through black and white glue, and the circuit of the backlight LED is LED out through the FPC and welded on the main FPC of the LCD. The traditional process wastes a lot of processes for connecting the circuit of the backlight, has low automation degree, needs more manual operation posts, and can lead to dirty backlight bonding pads and easy poor welding if the backlight or LCD is subjected to repeated repair with problems. And waste manpower and materials.

The invention provides a new way of connecting a backlight power supply circuit. By modifying the path of the backlight circuit, the backlight LED is linked with the main FPC, and is connected with the LCD as an intermediate circuit, so that the automatic production is realized from manual operation to mechanical operation. The main FPC is connected with a driving circuit of the liquid crystal through anisotropic conductive adhesive, and then a circuit of the backlight can be connected through double-sided conductive adhesive, so that the driving circuit is realized: the repair rate is improved, and the repair cost is reduced; the industrial process is optimized, and the manual post is reduced. The optimized industrial process only assembles the backlight.

The first scheme of the application: 1) When designing the FPC, leading a backlight circuit to the LCD; 2) When designing the LCD, the backlight circuit is led to the back of the LCD, namely the joint surface of the backlight circuit and the backlight; 3) When the backlight is designed, the shading area of the shading plate leaks out of the two corresponding areas, the size of the shading area is slightly larger than that of the copper leakage area of the LCD, the shading area is replaced by double-sided conductive adhesive, and the anode and the cathode of the backlight FPC are communicated.

The second scheme of the present application: 1) When designing the FPC, leading a backlight circuit to the LCD; 2) When designing the LCD, the backlight circuit is led to the front surface of the LCD, namely, the FPC surface is pressed and pasted, and two ends of the lower corner are provided; 3) And when the backlight is designed, the backlight PFC exceeds the area of the LCD, and then the circuit is conducted through the silver paste, so that the LCD and the FPC have a non-overlapping area, and the circuit is conveniently conducted through the silver paste in a gluing mode.

The liquid crystal display module is suitable for backlight LEDs, including mobile phone backlight, industrial control backlight, tablet personal computer backlight, television backlight and the like.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. It should be noted that, in "an embodiment," "for example," "another instance," and the like of the present application are intended to illustrate the present application, not to limit the present application. The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. The utility model provides a liquid crystal display module, includes liquid crystal display, main FPC and backlight unit, the liquid crystal display includes glass substrate, liquid crystal and the lower glass substrate that are connected, main FPC includes flexible main part, main FPC circuit and backlight FPC circuit, backlight unit includes light screen and backlight flexible circuit board, including the shading district and the light transmission district that are connected on the light screen, the glass substrate is connected down the light screen, main FPC circuit connection liquid crystal, its characterized in that, lower glass substrate is kept away from have two first copper leakage district on the one side of liquid crystal, two first copper leakage district is electric connection respectively backlight FPC circuit, the light screen have two connecting holes in the shading district, two connecting holes respectively with two first copper leakage district one-to-one, backlight flexible circuit board passes two through two double-sided conductive adhesive tape one-to-one behind the connecting hole and one-to-one electric connection two first copper leakage district, main FPC passes through the connection of different side conductive adhesive.

2. The liquid crystal display module according to claim 1, wherein the main FPC is connected to a predetermined position of one side of the lower glass substrate close to the liquid crystal through anisotropic conductive adhesive and connected to the liquid crystal.

3. The liquid crystal display module according to claim 1, wherein the two first copper leakage areas are aligned with the two connection holes, respectively.

4. The liquid crystal display module according to claim 3, wherein the area of the connection hole is larger than the area of the first copper leakage area.

5. The liquid crystal display module of claim 4, wherein the shape of the connection hole is the same as the shape of the first copper leakage area.

6. The liquid crystal display module comprises a liquid crystal display screen, a main FPC and a backlight module, wherein the liquid crystal display screen comprises an upper glass substrate, liquid crystal and a lower glass substrate which are connected, the main FPC comprises a flexible main body, a main FPC circuit and a backlight FPC circuit, the backlight module comprises a light shielding plate and a backlight flexible circuit board, the light shielding plate comprises a light shielding area and a light transmission area which are connected, the lower glass substrate is connected with the light shielding plate, and the main FPC circuit is connected with the liquid crystal. The two first copper leakage areas are respectively and electrically connected with the backlight FPC circuit; two copper leakage bulges are arranged on the backlight flexible circuit board, are positioned on two sides of the lower glass substrate, and are adjacent to the first copper leakage areas in a one-to-one correspondence manner; the copper leakage protrusions are respectively and correspondingly electrically connected with the first copper leakage areas, and the main FPC circuit is connected with the liquid crystal through anisotropic conductive adhesive.

7. The liquid crystal display module of claim 6, wherein each copper leakage bump is electrically connected to each first copper leakage area through a silver paste line.

8. The liquid crystal display module according to claim 7, wherein the copper leakage bump protrudes from a surface of the lower glass substrate near the liquid crystal.

9. The liquid crystal display module of claim 6, wherein the backlight flexible circuit board is provided with two second copper leakage areas, and each second copper leakage area is electrically connected with each copper leakage protrusion through a silver paste line in a one-to-one correspondence manner.

10. An electronic device comprising a liquid crystal display module according to any one of claims 1 to 9.