CN108132563B

CN108132563B - Backlight module, display screen and electronic equipment

Info

Publication number: CN108132563B
Application number: CN201810049426.4A
Authority: CN
Inventors: 张文真
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2018-01-18
Filing date: 2018-01-18
Publication date: 2020-06-12
Anticipated expiration: 2038-01-18
Also published as: CN108132563A

Abstract

The embodiment of the application provides a backlight module, a display screen and electronic equipment, wherein the backlight module comprises a plurality of light-emitting diodes, a flexible circuit board and a frame body, the plurality of light-emitting diodes are arranged in the frame body, and the flexible circuit board is arranged on the frame body; the flexible circuit board comprises a connecting portion and an extending portion, the connecting portion is located inside the frame body, the connecting portion is connected with the light emitting diodes, the extending portion is located on the outer side of the frame body, an adhesive is arranged on the extending portion, and the adhesive adheres to the extending portion and the outer side face of the frame body. The backlight module that this application embodiment provided can improve backlight module's waterproof performance, avoids backlight module to be damaged, and then can improve the structural stability of display screen.

Description

Backlight module, display screen and electronic equipment

Technical Field

The application relates to the technical field of electronic equipment, in particular to a backlight module, a display screen and electronic equipment.

Background

With the development of communication technology, electronic devices such as smart phones are becoming more and more popular. With the popularization of the full screen concept, the requirement of consumers on the screen ratio of electronic equipment is higher and higher, and the narrow frame also becomes the target pursued by terminal manufacturers.

Due to the technical requirements of the intelligent terminal, the touch screen and the shell need to be fixed through dispensing, so that the touch screen is prevented from being separated from the shell. However, in the dispensing process of the touch screen, the glue is easy to displace before curing, that is, the glue is easy to transfer to other positions except for the dispensing position, so that poor dispensing is caused, and the stability of the touch screen is affected.

Disclosure of Invention

The embodiment of the application provides a backlight module, a display screen and an electronic device, which can improve the structural stability of the display screen.

The embodiment of the application provides a backlight module, which comprises a plurality of light emitting diodes, a flexible circuit board and a frame body, wherein the plurality of light emitting diodes are arranged in the frame body;

the flexible circuit board comprises a connecting portion and an extending portion, the connecting portion is located inside the frame body, the connecting portion is connected with the light emitting diodes, the extending portion is located on the outer side of the frame body, an adhesive is arranged on the extending portion, and the adhesive adheres to the extending portion and the outer side face of the frame body.

The embodiment of the application further provides a display screen, which comprises a backlight module and a display panel, wherein the display panel is arranged on the backlight module, and the backlight module is the backlight module.

The embodiment of the application further provides an electronic device, which comprises a shell and a display screen, wherein the display screen is installed on the shell, and the display screen is the display screen.

The backlight module that this application embodiment provided because flexible circuit board includes the extension, be provided with the adhesive on the extension, the adhesive bonding the extension and the lateral surface of framework, thereby the adhesive can seal the gap between flexible circuit board and the framework to improve backlight module's waterproof performance, avoid backlight module to be damaged, and then can improve the structural stability of display screen.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a first structural schematic diagram of an electronic device according to an embodiment of the present application.

Fig. 2 is a second schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 3 is a first structural schematic diagram of a display screen according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a frame of the backlight module in the display screen shown in fig. 3.

Fig. 5 is a schematic structural diagram of a panel in the display screen shown in fig. 3.

Fig. 6 is a second structural schematic diagram of a display screen according to an embodiment of the present application.

Fig. 7 is a third schematic structural diagram of a display screen according to an embodiment of the present application.

Fig. 8 is a fourth structural schematic diagram of a display screen according to an embodiment of the present application.

Fig. 9 is a schematic view of a first structure of the flexible circuit board in the display screen shown in fig. 8.

Fig. 10 is a schematic diagram of a second structure of the flexible circuit board in the display screen shown in fig. 8.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The embodiment of the application provides electronic equipment. The electronic device can be a smart phone, a tablet computer and the like. Referring to fig. 1, an electronic device 100 includes a display screen 10, a circuit board 20, and a case 30.

The display screen 10 is mounted on the housing 30 to form a display surface of the electronic device 100. The display screen 10 serves as a front case of the electronic device 100, and forms an accommodating space with the housing 30 for accommodating other electronic components of the electronic device 100. Meanwhile, the display screen 10 forms a display surface of the electronic apparatus 100 for displaying information such as images, texts, and the like.

In some embodiments, as shown in FIG. 1, the display screen 10 may include a display area 101 and a non-display area 102. The display area 101 performs, among other things, the display function of the display screen 10 for displaying information such as images, text, etc. The non-display area 102 does not display information. The non-display area 102 may be used to set functional components such as a camera, a receiver, and a touch electrode of a display screen. In some embodiments, the non-display area 102 may include two areas located at the upper and lower portions of the display area 101.

In some embodiments, as shown in FIG. 2, the display screen 10 may be a full-face screen. At this time, the display screen 10 may display information in a full screen, so that the electronic apparatus 100 has a large screen occupation ratio. The display screen 10 includes only the display area 101 and does not include the non-display area. At this time, functional components such as a camera and a proximity sensor in the electronic apparatus 100 may be hidden under the display screen 10, and the fingerprint recognition module of the electronic apparatus 100 may be disposed on the back of the electronic apparatus 100.

The circuit board 20 is mounted inside the housing 30. For example, the circuit board 20 may be mounted in the receiving space. The circuit board 20 may be a motherboard of the electronic device 100. The circuit board 20 is provided with a ground point to ground the circuit board 20. One, two or more of the functional components such as a motor, a microphone, a speaker, a receiver, an earphone interface, a universal serial bus interface, a camera, a distance sensor, an ambient light sensor, a gyroscope, and a processor may be integrated on the circuit board 20. Meanwhile, the display screen 10 may be electrically connected to the circuit board 20.

In some embodiments, display control circuitry is provided on circuit board 20. The display control circuit outputs an electrical signal to the display screen 10 to control the display screen 10 to display information.

The housing 30 is used to form the outer contour of the electronic device 100. The material of the housing 30 may include at least one of plastic or metal. The housing 30 may be integrally formed. In the molding process of the housing 30, structures such as a rear camera hole and a fingerprint identification module mounting hole can be formed on the housing 30.

In some embodiments, the housing 30 may include a center frame and a back cover that combine with each other to form the housing 30. The middle frame and the rear cover may form a receiving space to receive the circuit board 20. In some embodiments, the display screen 10 includes a glass cover plate. The glass cover plate may be fixed to the case 30, and the glass cover plate and the case 30 form a receiving space to receive the circuit board 20. In some embodiments, the glass cover plate is covered on the middle frame, the rear cover is arranged on the middle frame, the glass cover plate and the rear cover are respectively positioned on two sides of the middle frame, and the glass cover plate and the rear cover are oppositely arranged.

In some embodiments, the housing 30 may be a metal housing, such as a metal such as magnesium alloy, stainless steel, and the like. It should be noted that the material of the housing 30 of the embodiment of the present application is not limited to this, and other manners may also be adopted, such as: the housing 30 may be a plastic housing. Also for example: the housing 30 is a ceramic housing. For another example: the housing 30 may include a plastic portion and a metal portion, and the housing 30 may be a housing structure in which metal and plastic are matched with each other. Specifically, the metal part may be formed first, for example, a magnesium alloy substrate is formed by injection molding, and then plastic is injected on the magnesium alloy substrate to form a plastic substrate, so as to form a complete housing structure.

In some embodiments, the Display 10 is a Liquid Crystal Display (LCD). As shown in fig. 3, the display panel 10 includes a backlight module 11, a light shielding layer 12, a display panel 13 and a glass cover plate 14. The backlight module 11, the light shielding layer 12, the display panel 13 and the glass cover plate 14 are sequentially stacked to form a complete display screen 10. The glass cover plate 14 is disposed on a side of the display panel 13 away from the backlight module 11.

In some embodiments, the backlight module 11 includes a plurality of light emitting diodes 111, a flexible circuit board 112, and a frame 113. The plurality of light emitting diodes 111 are mounted inside the frame 113. The plurality of light emitting diodes 111 are disposed spaced apart from each other. In some embodiments, the plurality of light emitting diodes 111 are arranged in a matrix to form a surface light source inside the display screen 10.

The flexible circuit board 112 is mounted on the frame 113. The flexible circuit board 112 is connected to the plurality of light emitting diodes 111. Meanwhile, the flexible circuit board 112 is connected to the circuit board 20 in the electronic device 100. Thus, the flexible circuit board 112 can transmit the control signal of the circuit board 20 to the plurality of light emitting diodes 111 to realize the control of the plurality of light emitting diodes 111 by the circuit board 20.

In some embodiments, referring also to fig. 4, the frame 113 includes a sidewall 1131 and a bottom wall 1132. The side wall 1131 is enclosed around the periphery of the bottom wall 1132, thereby forming a semi-enclosed frame 113. The frame 113 has an opening 1130 on the opposite side of the bottom wall 1132. The flexible circuit board 112 covers at least a portion of the opening 1130.

In some embodiments, the material of the frame 113 may include metal, for example, the material of the frame 113 may include aluminum alloy, magnesium alloy, or stainless steel.

The light shielding layer 12 is disposed on the backlight module 11. The light shielding layer 12 may be directly disposed on the flexible circuit board 112. The light shielding layer 12 is used for shielding light to prevent the light emitted from the backlight module 11 from being emitted from the side of the display screen 10. It can be understood that, since the backlight module 11 is used to provide a light source for the display screen 10, that is, the light emitted from the backlight module 11 needs to irradiate the display panel 13, the light shielding layer 12 cannot block the light emitted from the backlight module 11 to the display panel 13. Thus, the light shielding layer 12 may be disposed at the edge of the backlight assembly 11. For example, a circle of light shielding layer 12 may be disposed along the periphery of the backlight module 11.

In some embodiments, the light shielding layer 12 may be a light shielding glue, for example, the light shielding layer 12 may be a black light shielding glue. At this time, the light shielding layer 12 may serve to shield light, and may adhere electronic devices inside the display screen 10 together, so as to fix the electronic devices inside the display screen 10.

It is understood that, in some embodiments, since the area of the flexible circuit board 112 is smaller than the area of the opening 1130 of the frame 113, at least a part of the circumference of the frame 113 cannot be covered by the flexible circuit board 112. Thus, the light shielding layer 12 may be directly provided on the frame 113 at a portion of the frame 113 not covered by the flexible circuit board 112. At this time, the light shielding layer 12 may bond the frame 113 and the electronic devices inside the backlight module 11 together, as shown in fig. 3, to improve the structural stability of the backlight module 11.

The display panel 13 performs the display function of the display screen 10 for displaying information such as images, text, and the like. It can be understood that the light emitted from the backlight module 11 enters the display panel 13, and after passing through the display panel 13, the light is emitted from the display panel 13, so that the user can observe the information displayed by the display panel 13.

In some embodiments, the display panel 13 includes a first polarizer 131, a display layer 132, and a second polarizer 133. The first polarizer 131, the display layer 132, and the second polarizer 133 are sequentially stacked. The first polarizer 131 is disposed on one side of the display panel 13 close to the backlight module 11. The second polarizer 133 is disposed on a side of the display panel 13 away from the backlight module 11. The first polarizer 131 is used for providing a polarization effect to the light entering the display panel 13 from the backlight module 11, and the second polarizer 133 is used for providing a polarization effect to the light exiting from the display panel 132. The display function of the display panel 13 is specifically realized by the display layer 132.

In some embodiments, as shown in fig. 5, the display layer 132 includes an array substrate 1321, a liquid crystal layer 1322, and a color filter substrate 1323. The array substrate 1321, the liquid crystal layer 1322 and the color film substrate 1323 are sequentially stacked. The array substrate 1321 may include a glass substrate and a plurality of Thin Film Transistors (TFTs) disposed on the glass substrate. The liquid crystal layer 1322 controls the light transmittance at different positions by controlling the form of liquid crystal molecules, thereby implementing the function of displaying information. The color filter substrate 1323 includes a glass substrate and a color filter disposed on the glass substrate.

The glass cover 14 covers the display panel 13 to provide protection for the display panel 13, such as preventing the display panel 13 from being scratched or contaminated by dust. The glass cover 14 is a transparent glass cover, so that the emergent light of the display panel 13 can be emitted. In some embodiments, the glass cover plate 14 may be a glass cover plate made of a material such as sapphire.

In some embodiments, referring to fig. 6, fig. 6 is a schematic view of another structure of the display screen 10. The backlight module 11 further includes a supporting member 114. The support member 114 is disposed inside the frame 113. For example, the supporting member 114 may be disposed on a sidewall of the frame 113. It can be understood that the sidewall of the frame 113 has a low structural strength because the sidewall of the frame 113 is thin. The support member 114 is provided on the side wall of the frame 113, so that the overall structural strength of the frame 113 can be improved. At this time, the light shielding layer 12 may bond the sidewalls of the frame 113, the supporter 114, and the electronic devices inside the backlight assembly 11 together.

In some embodiments, an optical glue 15 is disposed between the display panel 13 and the glass cover plate 14. The display panel 13 and the glass cover plate 14 are bonded together by the optical glue 15. The optical adhesive is a high molecular substance which has optical performance similar to that of an optical element and has excellent adhesive performance, and is required to have the characteristics of being colorless and transparent, having light transmittance of more than 90 percent, having good adhesive strength, being capable of being cured at room temperature or intermediate temperature, having small curing shrinkage rate and the like. The optical glue can bond two or more optical elements into an optical assembly that meets the design requirements of the optical path. For example, optical adhesive 15 may be an OCA (optically clear ClearAdhesive) optical adhesive. The OCA optical adhesive is a double-sided adhesive tape formed by forming a base material by using an optical acrylic adhesive and then respectively attaching a layer of film to the upper surface and the lower surface of the base material.

In some embodiments, referring to fig. 7, fig. 7 is a schematic view of a further structure of the display screen 10. It can be understood that, since the display screen 10 includes the backlight module 11, the light shielding layer 12, and the display panel 13, and the backlight module 11, the light shielding layer 12, and the display panel 13 are sequentially stacked, a slight gap is formed at the stacking position of the backlight module 11, the light shielding layer 12, and the display panel 13. The gaps between the layers of the display screen 10 result in a lower waterproof performance of the display screen 10. For example, when water enters the display screen 10 during the use process of a user, the water may enter the backlight module 11 along the gap, which may cause the electronic devices in the backlight module 11 to fail, and further cause the entire display screen 10 to fail.

In order to improve the waterproof performance of the display screen 10, a layer of adhesive, such as glue, may be coated on the periphery of the display screen 10 to prevent the backlight module inside the display screen 10 from being damaged due to water. For example, a layer of glue may be applied to the periphery of the display screen 10 by a dispensing process. Specifically, as shown in fig. 7, a circle of glue 16 may be applied to the joint of the backlight module 11, the light shielding layer 12, and the display panel 13. Glue 16 covers the gap between backlight unit 11, light shield layer 12, display panel 13, also seals the gap between backlight unit 11, light shield layer 12, display panel 13 to even water enters into display screen 10, also can't cause the damage to backlight unit 11, can improve backlight unit 11's waterproof performance, and then improve display screen 10's structural stability.

In some embodiments, referring to fig. 8 and 9, fig. 8 is a schematic view of a further structure of the display screen 10, and fig. 9 is a schematic view of the flexible circuit board 112 in fig. 8. The flexible circuit board 112 includes a connecting portion 1122 and an extending portion 1121. The connecting portion 1122 is connected to the extending portion 1121. The connecting portion 1122 is located inside the housing 113. The connecting portion 1122 covers at least a portion of the opening 1130 of the frame 113. The connection portion 1122 is connected to the plurality of light emitting diodes 111. The extension portion 1121 is located outside the frame 113. The extension 1121 is provided with an adhesive 17. The adhesive 17 simultaneously contacts the extension portion 1121 and the outer side surface of the frame 113 to bond the extension portion 1121 and the outer side surface of the frame 113.

It can be understood that, in the process of disposing the adhesive on the periphery of the display screen 10, for example, in the process of disposing the glue on the periphery of the display screen 10 by the glue dispensing process, since the glue itself receives the action of gravity, before the glue is solidified, the glue is easy to fall off from the glue dispensing position on the display screen, so that the glue dispensing is poor, and after the glue dispensing, the good waterproof effect cannot be provided for the display screen 10.

After the extending portion 1121 is disposed on the flexible circuit board 112, when the adhesive 17 is disposed on the display screen 10, the extending portion 1121 can provide support for the adhesive 17 to prevent the adhesive from falling off the display screen 10. It should be noted that, in an actual manufacturing process, the glass cover 14 side of the display screen 10 may be disposed below, and the backlight module 11 side may be disposed above (i.e., in an opposite direction to that shown in fig. 8). Due to the supporting function of the extending portion 1121 of the flexible circuit board 112, the adhesive 17 will not fall off the display screen 10 even if it receives its own weight. At this time, the adhesive 17 may adhere the flexible circuit board 112 and the frame 113 together to improve the structural stability of the backlight module 11; on the other hand, the adhesive 17 may seal a gap between the flexible circuit board 112 and the frame 113, and prevent water from entering the backlight module 11 through the gap between the flexible circuit board 112 and the frame 113, so as to improve the waterproof performance of the backlight module 11, prevent the backlight module 11 from being damaged, and further improve the structural stability of the display screen 10.

In some embodiments, the adhesive 17 comprises glue, such as OCA optical glue. In some embodiments, the adhesive 17 may comprise glue, and the glue is black in color. At this time, the black glue can not only improve the structural stability of the backlight module 11 and improve the waterproof performance of the backlight module 11, but also play a role in shading the side of the backlight module 11 to prevent the light emitted by the backlight module 11 from being emitted to the outside through the side.

In some embodiments, as shown in fig. 10, the flexible circuit board 112 includes a connection portion 1122, an extension portion 1121, and a signal transmission portion 1123. The connecting portion 1122 is connected to the extending portion 1121 and the signal transmitting portion 1123, respectively. And the extension portion 1121 is spaced apart from the signal transmission portion 1123. The signal transmission portion 1123 is used for connecting with the circuit board 20 in the electronic device 100 to realize the connection between the flexible circuit board 112 and the circuit board 20. By connecting the signal transmission part 1123 with the circuit board 20, signal transmission between the circuit board 20 and the plurality of light emitting diodes 111 in the backlight module 11 can be realized, so that the plurality of light emitting diodes 111 in the backlight module 11 can be controlled by the circuit board 20.

The backlight module, the display screen and the electronic device provided by the embodiment of the application are described in detail, a specific example is applied to explain the principle and the implementation of the application, and the description of the embodiment is only used to help understanding the application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. The backlight module is characterized by being applied to a display screen, wherein the display screen does not comprise a non-display area, the backlight module comprises a plurality of light-emitting diodes, a flexible circuit board and a frame body, the light-emitting diodes are arranged in the frame body, and the flexible circuit board is arranged on the frame body;

the flexible circuit board comprises a connecting portion and an extending portion, the connecting portion is located inside the frame body, the connecting portion is connected with the light emitting diodes, the extending portion is located outside the frame body, the extending portion faces towards one face of the frame body, an adhesive is arranged on one face of the frame body and comprises glue, the extending portion is used for bearing the glue, the glue is prevented from sliding off, and the glue is used for sealing the extending portion and a gap between the frame bodies.

2. The backlight module as claimed in claim 1, wherein the frame has an opening, and the connecting portion covers at least a portion of the opening.

3. A backlight module according to claim 1, wherein the glue is black in color.

4. The backlight module as claimed in claim 1, wherein the frame comprises a metal.

5. The backlight module according to claim 1, further comprising a support member disposed inside the frame body.

6. A display screen, characterized in that, the display screen does not include a non-display area, the display screen includes a backlight module and a display panel, the display panel is disposed on the backlight module, the backlight module is the backlight module of any one of claims 1 to 5.

7. The display screen of claim 6, wherein the display panel comprises a first polarizer, a display layer and a second polarizer, the first polarizer, the display layer and the second polarizer are sequentially stacked, the first polarizer is disposed on one side of the display panel close to the backlight module, and the second polarizer is disposed on one side of the display panel away from the backlight module.

8. The display screen of claim 7, further comprising a glass cover plate disposed on the display panel, the glass cover plate being disposed on a side of the display panel facing away from the backlight module.

9. The display screen of claim 8, wherein an optical glue is disposed between the glass cover plate and the display panel.

10. An electronic device comprising a housing and a display screen mounted on the housing, the display screen being as claimed in any one of claims 6 to 9.