CN115236898B - Backlight module, mounting method of backlight module and display device - Google Patents

Backlight module, mounting method of backlight module and display device Download PDF

Info

Publication number
CN115236898B
CN115236898B CN202210950913.4A CN202210950913A CN115236898B CN 115236898 B CN115236898 B CN 115236898B CN 202210950913 A CN202210950913 A CN 202210950913A CN 115236898 B CN115236898 B CN 115236898B
Authority
CN
China
Prior art keywords
circuit board
flexible circuit
backlight module
guide plate
adjusting component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210950913.4A
Other languages
Chinese (zh)
Other versions
CN115236898A (en
Inventor
刘广平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd
Original Assignee
Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Guangzhou China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to CN202210950913.4A priority Critical patent/CN115236898B/en
Publication of CN115236898A publication Critical patent/CN115236898A/en
Application granted granted Critical
Publication of CN115236898B publication Critical patent/CN115236898B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/009—Positioning aspects of the light source in the package
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133612—Electrical details

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The embodiment of the application provides a backlight module, a mounting method of the backlight module and a display device. Wherein, backlight unit includes: a back plate; a light guide plate; the light bar comprises a first flexible circuit board and a second flexible circuit board which are arranged at intervals, the first flexible circuit board is fixedly connected with the light guide plate, and the second flexible circuit board is connected with the backboard; and the first adjusting assembly is connected with the first flexible circuit board and the second flexible circuit board so that the first flexible circuit board and the second flexible circuit board can move relatively. According to the embodiment of the application, the first flexible circuit board is fixedly connected with the light guide plate, so that gaps do not exist between the light bar and the light guide plate, the light bar and the light guide plate are not separated even in a reliability laboratory, the phenomenon that the brightness of the display panel is reduced due to the fact that gaps exist between the light bar and the light guide plate is prevented, and then the light efficiency can be guaranteed, so that the display effect of the display module is good, and the brightness is uniform.

Description

Backlight module, mounting method of backlight module and display device
Technical Field
The present disclosure relates to the field of display, and in particular, to a backlight module, a method for installing the backlight module, and a display device.
Background
With the increasing maturity of photoelectric technology and semiconductor manufacturing technology, flat panel display devices are being developed. Among them, the lcd has advantages of low voltage operation, no radiation scattering, light weight, and small size, and has been widely used in various electronic devices such as notebook computers, personal digital assistants, and cellular phones. Generally, a liquid crystal display includes a backlight module and a liquid crystal display panel, wherein the liquid crystal display panel is disposed on the backlight module, and the backlight module includes LED light bars, a light guide plate, and an optical film.
In display module assembly, usually LED lamp strip and light guide plate separately assemble, because LED lamp strip and light guide plate separately assemble, when environmental reliability test, LED lamp strip and light guide plate separate easily, lead to light efficiency variation, influence luminance in a poor light and display effect.
Disclosure of Invention
The embodiment of the application provides a backlight module, a mounting method of the backlight module and a display device, which can improve the condition that the existing backlight module has poor display effect.
The embodiment of the application provides a backlight module, the backlight module includes:
a back plate;
the light guide plate is arranged in the backboard;
the light bar comprises a first flexible circuit board and a second flexible circuit board which are arranged at intervals, the first flexible circuit board is fixedly connected with the light guide plate, and the second flexible circuit board is connected with the backboard;
and the first adjusting assembly is connected with the first flexible circuit board and the second flexible circuit board so that the first flexible circuit board can move relative to the second flexible circuit board.
Optionally, the first adjusting component is an elastic component with conductive performance, and the first flexible circuit board is electrically connected with the second flexible circuit board through the first adjusting component.
Optionally, a plurality of strings of light beads and a plurality of transient diodes are arranged on the first flexible circuit board, the strings of light beads are arranged at intervals along the length direction of the first flexible circuit board, and each string of light beads is connected with one transient diode in parallel.
Optionally, the back plate is provided with a mounting hole, and dispensing is arranged in the mounting hole so that the second flexible circuit board is adhered to the back plate.
Optionally, a conductive part is arranged on one side of the second flexible circuit board, which is close to the back plate;
the transient diode is connected with the conductive part, the conductive part is connected with the dispensing, and the dispensing has conductivity and is used for grounding.
Optionally, the light bar further includes a third flexible circuit board, the backlight module further includes a second adjusting component, the third flexible circuit board and the second flexible circuit board are disposed at two ends of the first flexible circuit board, the third flexible circuit board is connected with the first flexible circuit board through the second adjusting component, and the third flexible circuit board is connected with the back board.
Optionally, the second adjusting component is an elastic component with conductive performance, and the first flexible circuit board is electrically connected with the third flexible circuit board through the second adjusting component.
Optionally, the backplate includes main part and return bend portion, be provided with on the main part the mounting hole, return bend portion orientation deviates from the direction return bend of mounting hole is in order to cladding the lamp pearl.
The embodiment of the application also provides an installation method of the backlight module, which comprises the following steps:
providing a light bar and a first adjusting component, wherein the first adjusting component is connected with a first flexible circuit board and a second flexible circuit board of the light bar;
fixing the first flexible circuit board of the lamp strip with the light guide plate;
and loading the fixed lamp strip and the fixed light guide plate into a back plate so that the back plate is connected with the second flexible circuit board, and the first flexible circuit board can move relative to the second flexible circuit board.
The embodiment of the application also provides a display device, which comprises the backlight module set.
The beneficial effects of this application lie in: the backlight module that this embodiment provided includes backplate, light guide plate, lamp strip and adjusting part, wherein, the lamp strip includes first flexible circuit board and the second flexible circuit board that the interval set up, first flexible circuit board and light guide plate fixed connection, so that can not have the clearance between lamp strip and the light guide plate, even also can not separate when doing the reliability laboratory, prevent that display panel from because the phenomenon that the clearance leads to luminance to reduce between lamp strip and the light guide plate, and then can guarantee the light efficiency, make display module's display effect better, luminance is even. In addition, first flexible circuit board and second flexible circuit board are connected through first regulation subassembly, and second flexible circuit board is connected with the backplate to make first flexible circuit board and second flexible circuit board can relative movement, when first flexible circuit board follows the light guide plate motion promptly, the second flexible circuit board can still be in the static state, and then can guarantee the motion range of lamp strip in the backplate, in order to prevent the condition that the lamp strip is damaged because the too big striking backplate of motion range, thereby lead to the lamp strip.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings that are required to be used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
For a more complete understanding of the present application and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings. Wherein like reference numerals refer to like parts throughout the following description.
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present application.
Fig. 2 is a first plan view of a light bar in the backlight module shown in fig. 1.
Fig. 3 is a bottom view of a light bar in the backlight module shown in fig. 2.
Fig. 4 is a second plan view of a light bar in the backlight module shown in fig. 1.
Fig. 5 is a top view of the connection between the light bar and the light guide plate in the backlight module shown in fig. 2.
Fig. 6 is a flowchart illustrating an installation method of a backlight module according to an embodiment of the present application.
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 will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting 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 one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The electrostatic discharge (Electrostatic Discharge, ESD) causes electrostatic breakdown of the display device, reducing the yield and quality of the product. Therefore, the anti-ESD capability is an important indicator of the lcd module, and the backlight is an important component of the lcd module, and the backlight includes LED devices, so the backlight should also have the corresponding anti-ESD capability.
In the current solution, the method for improving the ESD resistance of the LEDs in the backlight is to connect TVS tubes in parallel on each string of LED lines, one end of each TVS tube is required to be grounded, and when the ESD occurs and the instant large current impact occurs, the TVS tubes are conducted to protect the LEDs from being damaged by the large current impact. In the display module assembly, normally LED lamp strip and light guide plate separately assemble, and the TVS pipe is beaten the piece and is on the FPC of LED lamp strip, and the copper that exposes at the LED lamp strip back is switched on with backplate (chase) ground connection in a poor light through conductive adhesive, realizes the ground connection of TVS end like this. The scheme has a disadvantage that the LED light bar and the light guide plate are assembled separately, so that the LED light bar and the light guide plate are separated easily when the environment reliability test is performed, the light efficiency is poor, and the backlight brightness and the display effect are affected. And if the LED light bar and the light guide plate are adhered together through the double faced adhesive tape, and then are integrally assembled, the scheme can avoid the separation of the LED and the light guide plate in the reliability test, but for backlight, because of the U-shaped structure with the iron frame, when the light guide plate and the LED light bar are obliquely inserted into the U-shaped structure, the conductive double faced adhesive tape on the back of the LED light bar is easily adhered with the iron frame and is not easy to be inserted into the U-shaped structure, and the assembly is difficult.
Therefore, in order to solve the above-mentioned problems, the present application provides a backlight module, a method for mounting the backlight module, and a display device. The present application is further described below with reference to the drawings and embodiments.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the present application. Fig. 2 is a first plan view of a light bar in the backlight module shown in fig. 1. The embodiment of the present application provides a backlight module 100, where the backlight module 100 includes a back plate 10, a light guide plate 20, a light bar 30 and a first adjusting component 510; the light guide plate 20 is disposed in the back plate 10; the light bar 30 comprises a first flexible circuit board 310 and a second flexible circuit board 320 which are arranged at intervals, the first flexible circuit board 310 is fixedly connected with the light guide plate 20, and the second flexible circuit board 320 is connected with the backboard 10; the first adjustment assembly 510 connects the first flexible circuit board 310 and the second flexible circuit board 320 to enable the first flexible circuit board 310 and the second flexible circuit board 320 to move relative to each other. According to the embodiment of the application, the first flexible circuit board 310 is fixedly connected with the light guide plate 20, so that a gap does not exist between the light bar 30 and the light guide plate 20, the light guide plate is not separated even in a reliability laboratory, the phenomenon that the brightness of a backlight module is reduced due to the fact that the gap exists between the light bar 30 and the light guide plate 20 is prevented, the light efficiency can be guaranteed, the display effect of the backlight module 100 is good, and the brightness is uniform. In addition, the first flexible circuit board 310 and the second flexible circuit board 320 are connected through the first adjusting component 510, and the second flexible circuit board 320 is connected with the back board 10, so that the first flexible circuit board 310 can move relative to the second flexible circuit board 320, that is, when the first flexible circuit board 310 moves along with the light guide board 20, the second flexible circuit board 320 can still be in a static state, and further, the movement amplitude of the light bar 30 in the back board 10 can be ensured, so that the light bar 30 is prevented from being damaged due to the fact that the light bar 30 impacts the back board 10 due to the overlarge movement amplitude.
The first flexible circuit board 310 is provided with a plurality of strings of lamp beads 350 and a plurality of transient diodes 340, the strings of lamp beads 350 are arranged at intervals along the length direction of the first flexible circuit board 310, each string of lamp beads 350 is connected with one transient diode 340 in parallel, and when the ESD occurs and instant heavy current impact occurs, the transient diode 340 is conducted, so that the lamp beads 350 are protected from the heavy current impact damage.
The first adjustment assembly 510 is an elastic member having conductive properties, and the first flexible circuit board 310 is electrically connected to the second flexible circuit board 320 through the first adjustment assembly 510. Because the first adjusting component 510 is an elastic component and can generate elastic deformation, when the first flexible circuit board 310 moves along with the light guide plate 20, the distance between the first flexible circuit board 310 and the second flexible circuit board 320 is larger, the elastic deformation generated by the first adjusting component 510 can play a role in buffering, further, the continuous electric connection between the first flexible circuit board 310 and the second flexible circuit board 320 can be ensured, the situation that the first flexible circuit board 310 and the second flexible circuit board 320 are disconnected due to the fact that the first adjusting component 510 is not elastic and broken is avoided, and the situation that the second flexible circuit board 320 and the backboard 10 are separated due to overlarge pulling force can be avoided. In addition, since the first adjusting component 510 is an elastic component, after the first flexible circuit board 310 moves along the light guide plate 20 in a direction away from the second flexible circuit board 320, the first adjusting component 510 acts an elastic force on the first flexible circuit board 310 to drive the first flexible circuit board 310 and the lamp panel to restore to the initial position, so that the relative fixing of the positions of the first flexible circuit board 310 and the second flexible circuit board 320 in the back plate 10 can be ensured, and the situation that the first flexible circuit board 310 cannot restore to the initial state after moving along the light guide plate 20 can be avoided, so as to avoid the influence on other devices. In addition, the elastic action of the first adjusting component 510 can make the stress of the first flexible circuit board 310 more uniform, and the motion stability is better.
It should be noted that, the range of the elastic deformation of the first adjusting component 510 may be set according to the actual situation, where the range of the elastic deformation needs to meet the requirement that the first flexible circuit board 310 follows the range of the movement of the light guide plate 20 when the display module performs the environmental reliability test, and the situation that the light bar 30 hits other devices due to the overlarge range of the movement of the first flexible circuit board 310 following the light guide plate 20 needs to be prevented. Therefore, the specific range of the elastic deformation of the first adjusting component 510 needs to be set according to the practical application, which is not particularly limited herein.
The first adjusting component 510 has conductivity, so that static electricity generated by the transient diode 340 on the first flexible circuit board 310 can be led into the second flexible circuit board 320, and led into the ground through the second flexible circuit board 320, so as to protect the lamp bead 350 from high current impact loss.
In some embodiments, the first adjusting component 510 may be a spring with conductive property, and the spring has a larger elastic restoring force, and is easy to obtain materials and has a lower manufacturing cost.
The first adjusting component 510 may be a plurality of curves or may be a net shape. The design is specifically based on the actual situation, and is not particularly limited herein.
The first flexible circuit board 310 is further provided with a golden finger part 313 for connecting with the bonding pad, the golden finger part 313 has a strip-shaped body, one end of the body is provided with an electroplating lead corresponding to the bonding pad, and the electroplating lead is a plurality of strip-shaped leads.
With continued reference to fig. 3 to 5, fig. 3 is a bottom view of a light bar in the backlight module shown in fig. 2. Fig. 4 is a second plan view of a light bar in the backlight module shown in fig. 1. Fig. 5 is a top view of the connection between the light bar and the light guide plate in the backlight module shown in fig. 2. The back plate 10 is provided with mounting holes in which the dispensing 60 is disposed to adhere the second flexible circuit board 320 to the back plate 10. In some embodiments, the positions of the mounting holes on the back board 10 correspond to the positions of the second flexible circuit board 320, so that the dispensing device 60 can just connect the second flexible circuit board 320 with the back board 10. In addition, compared with the prior art, the second flexible circuit board 320 is connected with the back board 10 through the conductive double sided adhesive tape, and after the light guide plate 20 and the light bar 30 are adhered together, when the light guide plate is obliquely inserted into the U-folded structure of the back board 10, the conductive double sided adhesive tape contacts with the back board 10, and adhesion occurs, so that the assembly is not easy. And this application embodiment is through point gum 60 connection second flexible circuit board 320 and backplate 10, and point gum 60 can evenly coat in the mounting hole, and its viscosity is also higher than ordinary viscose to can be more firmly with second flexible circuit board 320 and backplate 10 fixed connection together, avoid appearing the condition of coming unstuck in the use. Particularly, under the condition that the screen frame is narrowed, the adhesive dispensing 60 is arranged in the mounting hole of the back plate 10, so that the risk of degumming of the second flexible circuit board 320 and the back plate 10 in the daily use process is increased due to the fact that the size of the adhesive on the second flexible circuit board 320 is reduced, and the fixing firmness of the second flexible circuit board 320 and the back plate 10 can be improved.
In some embodiments, a conductive portion 40 is disposed on a side of the second flexible circuit board 320 near the back plate 10, and the second flexible circuit board 320 is connected to the back plate 10 through connection between the conductive portion 40 and the dispensing 60. The conductive portion 40 may be exposed copper.
The dispensing 60 has conductivity and is used for grounding.
According to the embodiment of the application, the transient diode 340 on the first flexible circuit board 310 is connected with the conductive part 40 of the second flexible circuit board 320 through the first adjusting component 510, the conductive part 40 is connected with the adhesive 60 and then grounded, so that when the instant large current impact of the ESD occurs, the transient diode 340 is conducted to the ground after sequentially passing through the first adjusting component 510, the conductive part 40 and the adhesive 60, and therefore the LED can be protected from being damaged by the large current impact.
In some embodiments, the light bar 30 further includes a third flexible circuit board 330, the backlight module 100 further includes a second adjusting assembly 520, the third flexible circuit board 330 and the second flexible circuit board 320 are disposed at two ends of the first flexible circuit board 310, the third flexible circuit board 330 is connected to the first flexible circuit board 310 through the second adjusting assembly 520, and the third flexible circuit board 330 is connected to the back plate 10. Through setting up third flexible circuit board 330 and second flexible circuit board 320 at the both ends of first flexible circuit board 310 to connect through first adjusting part 510 and second adjusting part 520 respectively, can make the both ends synchronous motion of first flexible circuit board 310, make the motion process that first flexible circuit board 310 followed light guide plate 20 more stable.
The second adjusting component 520 is an elastic component with conductive performance, and the first flexible circuit board 310 is electrically connected to the third flexible circuit board 330 through the second adjusting component 520.
Referring to fig. 5 again, the light guide plate 20 and the first flexible circuit board 310 are connected by a double sided tape 70, where the double sided tape 70 may be a rectangle of a whole strip, or may be a sheet form with partially discrete distribution, and may be specifically configured according to practical situations, which is not limited herein.
Referring to fig. 1 again, the back plate 10 includes a main body 120 and a bending portion 110, the main body 120 is provided with a mounting hole, and the bending portion 110 bends back towards a direction away from the mounting hole to cover the lamp beads 350, so as to prevent the bright light emitted by the lamp beads 350 from being exposed from the lower end of the backlight module 100.
The backlight module 100 further includes a small white reflector 806, where the small white reflector 806 is disposed on a side of the lamp bead 350 away from the mounting hole and above the lamp bead 350 and a portion of the light guide plate 20, so as to reflect the light emitted from the lamp bead 350 toward the return bend 110 onto the light guide plate 20, so as to improve the light intensity.
The backlight module 100 further includes a light shielding glue 807, where the light shielding glue 807 is disposed on a side of the return bend portion 110 away from the lamp beads 350, for preventing side light emission, and the light shielding glue 807 is disposed above the return bend portion 110 to make the entire backlight module 100 emit light uniformly.
The backlight module 100 further includes a reflective sheet 801, where the reflective sheet 801 is disposed on a side of the light guide plate 20 near the main body 120, for reflecting light onto the light guide plate 20.
The backlight module 100 further includes a lower diffusion sheet 802, a lower light enhancement film 803, an upper light enhancement film 804 and an upper diffusion sheet 805 disposed in order on a side of the light guide plate 20 away from the reflective sheet 801, for enhancing the intensity of light emitted from the light guide plate 20.
With continued reference to fig. 6, fig. 6 is a flowchart illustrating an installation method of a backlight module according to an embodiment of the present disclosure. The embodiment of the present application further provides an installation method of the backlight module 100, which is used for assembling any one of the backlight modules 100, wherein a specific installation process is as follows:
101. the method comprises the steps of providing a light bar and a first adjusting assembly, wherein the first adjusting assembly is connected with a first flexible circuit board and a second flexible circuit board of the light bar.
The light bar 30 includes a first flexible circuit board 310 and a second flexible circuit board 320 disposed at intervals, wherein a first adjustment assembly 510 connects the first flexible circuit board 310 and the second flexible circuit board 320.
It should be noted that, the first flexible circuit board 310 and the second flexible circuit board 320 of the first adjusting component 510 and the light bar 30 may be integrally formed, or may be connected at a later stage, and may be specifically set according to practical situations, which is not specifically limited herein.
102. And fixing the first flexible circuit board of the light bar with the light guide plate.
The first flexible circuit board 310 of the light bar 30 is fixedly connected with the light guide plate 20 through the double faced adhesive tape 70.
103. And loading the fixed lamp strip and the fixed light guide plate into the back plate so that the back plate is connected with the second flexible circuit board, and the first flexible circuit board can move relative to the second flexible circuit board.
The back plate 10 includes a main body portion 120 and a bending portion 110, wherein a mounting hole is provided on the main body portion 120, and the bending portion 110 bends back toward a direction away from the mounting hole.
The fixed light bar 30 and the light guide plate 20 are installed in the bent back portion 110 of the back plate 10, and the dispensing 60 is disposed in the mounting hole of the main body portion 120, and the back plate 10 and the second flexible circuit board 320 are connected after the dispensing 60 is cured, so that the first flexible circuit board 310 can move relative to the second flexible circuit board 320.
The embodiment of the application also provides a display device, which comprises any one of the backlight modules 100.
The backlight module, the mounting method of the backlight module and the display device provided by the embodiment of the application are described in detail. Specific examples are set forth herein to illustrate the principles and embodiments of the present application, with the description of the examples given above only to assist in understanding the present application. Meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.

Claims (9)

1. The utility model provides a backlight unit which characterized in that, backlight unit includes:
a back plate;
the light guide plate is arranged in the backboard;
the lamp strip comprises a first flexible circuit board and a second flexible circuit board which are arranged at intervals, a lamp bead is arranged on the first flexible circuit board, the first flexible circuit board is fixedly connected with the light guide plate, and the second flexible circuit board is connected with the back plate;
the first adjusting component is connected with the first flexible circuit board and the second flexible circuit board so that the first flexible circuit board and the second flexible circuit board can move relatively, the first adjusting component is an elastic piece with conductivity, and the first flexible circuit board is electrically connected with the second flexible circuit board through the first adjusting component.
2. The backlight module according to claim 1, wherein a plurality of strings of light beads and a plurality of transient diodes are arranged on the first flexible circuit board, the strings of light beads are arranged at intervals along the length direction of the first flexible circuit board, and each string of light beads is connected with one transient diode in parallel.
3. A backlight module according to claim 2, wherein the back plate is provided with mounting holes, and dispensing is provided in the mounting holes to bond the second flexible circuit board to the back plate.
4. A backlight module according to claim 3, wherein a conductive part is arranged on one side of the second flexible circuit board close to the back plate;
the transient diode is connected with the conductive part, the conductive part is connected with the dispensing, and the dispensing has conductivity and is used for grounding.
5. The backlight module according to claim 1, wherein the light bar further comprises a third flexible circuit board, the backlight module further comprises a second adjusting component, the third flexible circuit board and the second flexible circuit board are arranged at two ends of the first flexible circuit board, the third flexible circuit board is connected with the first flexible circuit board through the second adjusting component, and the third flexible circuit board is connected with the back plate.
6. A backlight module according to claim 5, wherein the second adjusting component is an elastic component with conductive property, and the first flexible circuit board is electrically connected with the third flexible circuit board through the second adjusting component.
7. A backlight module according to claim 3, wherein the back plate comprises a main body portion and a return portion, the main body portion is provided with the mounting hole, and the return portion is bent back towards a direction away from the mounting hole so as to cover the lamp beads.
8. The method for installing the backlight module is characterized by comprising the following steps:
providing a light bar and a first adjusting component, wherein the first adjusting component is connected with a first flexible circuit board and a second flexible circuit board of the light bar, a light bead is arranged on the first flexible circuit board, the first adjusting component is an elastic piece with electric conduction performance, and the first flexible circuit board is electrically connected with the second flexible circuit board through the first adjusting component;
fixing the first flexible circuit board of the lamp strip with the light guide plate;
and loading the fixed lamp strip and the fixed light guide plate into a back plate so that the back plate is connected with the second flexible circuit board, and the first flexible circuit board can move relative to the second flexible circuit board.
9. A display device comprising a backlight module according to any one of claims 1-7.
CN202210950913.4A 2022-08-09 2022-08-09 Backlight module, mounting method of backlight module and display device Active CN115236898B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210950913.4A CN115236898B (en) 2022-08-09 2022-08-09 Backlight module, mounting method of backlight module and display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210950913.4A CN115236898B (en) 2022-08-09 2022-08-09 Backlight module, mounting method of backlight module and display device

Publications (2)

Publication Number Publication Date
CN115236898A CN115236898A (en) 2022-10-25
CN115236898B true CN115236898B (en) 2024-03-22

Family

ID=83678551

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210950913.4A Active CN115236898B (en) 2022-08-09 2022-08-09 Backlight module, mounting method of backlight module and display device

Country Status (1)

Country Link
CN (1) CN115236898B (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203615191U (en) * 2013-12-13 2014-05-28 厦门天马微电子有限公司 Backlight module, display device and portable terminal equipment
CN104748020A (en) * 2015-04-27 2015-07-01 京东方科技集团股份有限公司 Backlight module, display panel and display device
CN108156288A (en) * 2018-01-02 2018-06-12 京东方科技集团股份有限公司 A kind of display module and preparation method thereof
CN209640651U (en) * 2019-04-16 2019-11-15 北京小米移动软件有限公司 Backlight, backlight module and mobile terminal
CN211061824U (en) * 2019-12-19 2020-07-21 京东方科技集团股份有限公司 Backlight module and display device
CN111986563A (en) * 2020-08-25 2020-11-24 上海创功通讯技术有限公司 Backlight module and display device
CN113900303A (en) * 2021-10-21 2022-01-07 合肥京东方显示光源有限公司 Backlight module and display device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203615191U (en) * 2013-12-13 2014-05-28 厦门天马微电子有限公司 Backlight module, display device and portable terminal equipment
CN104748020A (en) * 2015-04-27 2015-07-01 京东方科技集团股份有限公司 Backlight module, display panel and display device
CN108156288A (en) * 2018-01-02 2018-06-12 京东方科技集团股份有限公司 A kind of display module and preparation method thereof
CN209640651U (en) * 2019-04-16 2019-11-15 北京小米移动软件有限公司 Backlight, backlight module and mobile terminal
CN211061824U (en) * 2019-12-19 2020-07-21 京东方科技集团股份有限公司 Backlight module and display device
CN111986563A (en) * 2020-08-25 2020-11-24 上海创功通讯技术有限公司 Backlight module and display device
CN113900303A (en) * 2021-10-21 2022-01-07 合肥京东方显示光源有限公司 Backlight module and display device

Also Published As

Publication number Publication date
CN115236898A (en) 2022-10-25

Similar Documents

Publication Publication Date Title
CN101464572B (en) LCD module and assembling method thereof
CN103217824B (en) With the display device of bottom bracket
US8687142B2 (en) Backlight unit comprising a bottom cover including an embossing portion that overlaps with a portion of an LED package and liquid crystal display using the same
KR101285536B1 (en) Flat panel display
CN2785066Y (en) Display module
US20230326421A1 (en) Light-emitting assembly
US8485677B2 (en) Backlight module and lamp installation device thereof
TW201219896A (en) Display device
CN115236898B (en) Backlight module, mounting method of backlight module and display device
CN102187745A (en) Flexible substrate and display device provided with same
CN105717708A (en) Backlight module, display module and display device
US11340395B2 (en) Light source, backlight module and manufacturing method thereof, and display device
CN102073160A (en) Liquid crystal display device
CN113721387B (en) Backlight module and display device
CN109765709A (en) A kind of military low-temperature resistance display module
CN110095905B (en) Installing frame, backlight module, display module and display device
CN209979975U (en) Lateral-entering backlight module with light and thin structure
CN1245059C (en) Electronic parts module and electric equipment
CN100529902C (en) Liquid crystal display unit
CN209373289U (en) A kind of military display module
CN208399862U (en) A kind of electronic equipment and backlight module
JP7428764B2 (en) Light source module and backlight display module
WO2019056832A1 (en) Backlight module and assembly method thereof, and display panel
CN109765711A (en) A kind of military display module
CN220419753U (en) Display screen adopting bending backlight FPC

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant