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GB2546678A - Backlight module and display - Google Patents

Backlight module and display Download PDF

Info

Publication number
GB2546678A
GB2546678A GB1706598.8A GB201706598A GB2546678A GB 2546678 A GB2546678 A GB 2546678A GB 201706598 A GB201706598 A GB 201706598A GB 2546678 A GB2546678 A GB 2546678A
Authority
GB
United Kingdom
Prior art keywords
double
guide plate
adhesive tape
light guide
sided adhesive
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.)
Granted
Application number
GB1706598.8A
Other versions
GB2546678B (en
GB201706598D0 (en
Inventor
Zhou Gege
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.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics 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 Shenzhen China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Publication of GB201706598D0 publication Critical patent/GB201706598D0/en
Publication of GB2546678A publication Critical patent/GB2546678A/en
Application granted granted Critical
Publication of GB2546678B publication Critical patent/GB2546678B/en
Expired - Fee Related 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
    • F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
    • F21V17/101—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
    • 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
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • 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
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer
    • 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • 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
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
    • G02F1/133317—Intermediate frames, e.g. between backlight housing and front frame

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

A backlight module and a display. The backlight module comprises a light guide plate (10), a light source assembly (20), a frame (30) and multiple layers of optical films (40). The frame (30) surrounds the light guide plate (10). The light source assembly (20) is arranged between one edge of the light guide plate (10) and the frame (30). The light source assembly (20) comprises a circuit board (22) and a light-emitting piece (24). The light-emitting piece (24) is located between the light guide plate (10) and the frame (30). The circuit board (22) is located above the edge of the light guide plate (10). The optical films (40) are stacked on the light guide plate (10). The backlight module further comprises a first double-faced adhesive tape (50) and a second double-faced adhesive tape (60). The edges of the optical films (40) are stacked and arranged in a step-like manner. The first double-faced adhesive tape (50) is bonded between the light guide plate (10) and the bottom surface of the circuit board (22). The first double-faced adhesive tape (50) comprises an edge part bonded to the optical film (40) at the bottommost layer. The second double-faced adhesive tape (60) is bonded to the top surface of the circuit board (22), the edge part of the first double-faced adhesive tape (50) and the edges of the optical films (40) except the optical film (40) on the bottommost layer. The backlight module and the display have the advantage of being easy to assemble.

Description

BACKLIGHT MODULE AND DISPLAY DEVICE
CROSS-REFERENCE TO RELATED ARTS
[0001] This application claims the priority of Chinese Patent Application No. 201410654607.1 filed on November 17, 2014, entitled “Backlight Module and Display Device”, the disclosure of which is incorporated herein by reference in its entirety.
TECHNICAL FIELD OF THE INVENTION
[0002] The present invention relates to the field of liquid crystal display technology, and more particularly to a backlight module and a display device.
DESCRIPTION OF THE PRIOR ART
[0003] Nowadays, liquid crystal displays have been increasingly widely used in various electronic products to serve as a display component of electronic devices. A prior art backlight module often comprises a resin frame, a light guide plate, a light source circuit board, and an optical film. The light source circuit board has a bottom surface that is fixed, through double-sided adhesive tapes, to the light guide plate and the resin frame. The optical film generally includes multiple layers or sheets, such as a diffusion sheet, a prism sheet, and a polarizer sheet. Each of the optical film sheet must be secured and it is a common practice to fix the optical film, by means of double-sided adhesive tapes, to a top surface of the light source circuit board.
[0004] It is an issue that is under constant research and study in this industry to provide a backlight module that allows an optical film, a light guide plate, a light source circuit boar, and a resin frame to be readily fixed to each other in a simpler manner for easy assembly.
SUMMARY OF THE INVENTION
[0005] The technical issue to be addressed by the present invention is to provide a backlight module and a display device, such that the backlight module and the display device possess advantages of simple assembly structure and being easy to assemble.
[0006] To achieve the above object, an embodiment of the present invention provides the following technical solution: [0007] In an aspect, the present invention provides a backlight module, which comprises a light guide plate, a light source assembly, an edge frame, and a number of optical sheets. The edge frame surrounds the light guide plate. The light source assembly is arranged between an edge portion of the light guide plate and the edge frame. The light source assembly comprises a circuit board and a light emission element. The light emission element is located between the light guide plate and the edge frame. The circuit board is located above the edge portion of the light guide plate. The optical sheets are arranged, in a stacked manner, on the light guide plate. The backlight module further comprises a first double-sided adhesive tape and a second double-sided adhesive tape. The number of optical sheets has edge portions that are stacked in a stairway-like arrangement. The first double-sided adhesive tape is adhesively bonded between the light guide plate and a bottom surface of the circuit board. The first double-sided adhesive tape comprises an edge section. The edge section is adhesively attached to a bottommost one of the optical sheets. The second double-sided adhesive tape is adhesively attached to a top surface of the circuit board, the edge section of the first double-sided adhesive tape, and the edge portions of remaining ones of the optical sheets excluding the bottommost optical sheet.
[0008] In the above backlight module, the edge frame comprises a first positioning surface and a second positioning surface that are arranged in a step-like form. The first positioning surface is located on an inner circumference of the second positioning surface. The first positioning surface is substantially flush with the edge portion of the light guide plate. The bottom surface of the circuit board is fixed through the first double-sided adhesive tape to the first positioning surface and the edge portion of the light guide plate. The second positioning surface is substantially flush with the top surface of the circuit board.
[0009] In the above backlight module, the backlight module further comprises a back board. The back board comprises a bottom plate and an outer wall. The outer wall extends vertically from an edge of the bottom plate. The edge frame is fixed, together with the light guide plate, the optical sheets, and the light source assembly, to the back board. The outer wall has a top surface that is substantially flush with the second positioning surface.
[00010] In the above backlight module, the backlight module further comprises a reflection sheet. The reflection sheet is arranged between the light guide plate and the bottom plate.
[00011] In the above backlight module, the light guide plate has a bottom surface that is coated with a reflective coating layer. The reflective coating layer is set in contact engagement with the bottom plate.
[00012] In the above backlight module, the first double-sided adhesive tape and the second double-sided adhesive tape are both a light-shielding double-sized adhesive tape.
[00013] In the above backlight module, the number of the optical sheets is three; and the edge section of the first double-sided adhesive tape that is adhesively attached to the bottommost one of the optical sheets has a top surface that is substantially flush with a top surface of a middle one of the optical sheets.
[00014] In another aspect, the present invention also provides a display device. The display device comprises a backlight module and a display panel. The backlight module comprises a light guide plate, a light source assembly, an edge frame, and a number of optical sheets. The edge frame surrounds the light guide plate. The light source assembly is arranged between an edge portion of the light guide plate and the edge frame. The light source assembly comprises a circuit board and a light emission element. The light emission element is located between the light guide plate and the edge frame. The circuit board is located above the edge portion of the light guide plate. The optical sheets are arranged, in a stacked manner, on the light guide plate. The backlight module further comprises a first double-sided adhesive tape and a second double-sided adhesive tape. The number of optical sheets has edge portions that are stacked in a stairway-like arrangement. The first double-sided adhesive tape is adhesively bonded between the light guide plate and a bottom surface of the circuit board. The first double-sided adhesive tape comprises an edge section. The edge section is adhesively attached to a bottommost one of the optical sheets. The second double-sided adhesive tape is adhesively attached to a top surface of the circuit board, the edge section of the first double-sided adhesive tape, and the edge portions of remaining ones of the optical sheets excluding the bottommost optical sheet. The display panel is arranged above the backlight module. A top surface of the second double-sided adhesive tape is adhesively attached to the display panel.
[00015] In the above display device, the edge frame comprises a first positioning surface and a second positioning surface that are arranged in a step-like form. The first positioning surface is located on an inner circumference of the second positioning surface. The first positioning surface is substantially flush with the edge portion of the light guide plate. The bottom surface of the circuit board is fixed through the first double-sided adhesive tape to the first positioning surface and the edge portion of the light guide plate.
The second positioning surface is substantially flush with the top surface of the circuit board.
[00016] In the above display device, the backlight module further comprises a back board. The back board comprises a bottom plate and an outer wall. The outer wall extends vertically from an edge of the bottom plate. The edge frame is fixed, together with the light guide plate, the optical sheets, and the light source assembly, to the back board. The outer wall has a top surface that is substantially flush with the second positioning surface.
[00017] In the above display device, the backlight module further comprises a reflection sheet. The reflection sheet is arranged between the light guide plate and the bottom plate.
[00018] In the above display device, the light guide plate has a bottom surface that is coated with a reflective coating layer. The reflective coating layer is set in contact engagement with the bottom plate.
[00019] In the above display device, the first double-sided adhesive tape and the second double-sided adhesive tape are both a light-shielding double-sized adhesive tape.
[00020] In the above display device, the number of the optical sheets is three; and the edge section of the first double-sided adhesive tape that is adhesively attached to the bottommost one of the optical sheets has a top surface that is substantially flush with a top surface of a middle one of the optical sheets s.
[00021] The present invention is structured such that the edge portions of the number of optical sheets are stacked on each other to show a stairway like arrangement and the first double-sided adhesive tape is adhesively bonded between the light guide plate and the circuit board, with an edge section of the first double-sided adhesive tape adhesively attached to the bottommost optical sheet, and the second double-sided adhesive tape is adhesively attached to a top surface of the circuit board, the edge section of the first double-sided adhesive tape, and the edge portions of the other sheets of the optical sheets except the bottommost sheet. Such an arrangement has a simple configuration and provides an advantage of easy assembly of the backlight module with a display device.
BRIEF DESCRIPTION OF THE DRAWINGS
[00022] To more clearly explain the technical solution of the present invention, a brief description of the drawings that are necessary for embodiment is given as follows. It is obvious that the drawings that will be described below show only some embodiments of the present invention. For those having ordinary skills of the art, other drawings may also be readily available from these attached drawings without the expense of creative effort and endeavor.
[00023] FIG. 1 is a cross-sectional view illustrating a backlight module according to an embodiment of the present invention.
PREFERRED EMBODIMENTS
[00024] A clear and complete description will be given to a technical solution of an embodiment of the present invention with reference to the attached drawings of the embodiment of the present invention.
[00025] Referring to FIG. 1, the present invention provides a backlight module, which comprises a light guide plate 10, a light source assembly 20, an edge frame 30, and a plurality of optical sheets 40. The light guide plate 10 is arranged in a hollowed area of the edge frame 30 and the edge frame 30 surrounds the light guide plate 10. The light source assembly 20 is arranged between to an edge of the light guide plate 10 (which is an light incidence side of the light guide plate 10) and the edge frame 30. The light source assembly 20 comprises a circuit board 22 and a light emission element 24. The light emission element 24 is integrally formed on the circuit board 22. To assemble, the light emission element 24 is set and located between the light guide plate 10 and the edge frame 30 and the circuit board 22 is set and located above the edge of the light guide plate 10. The optical sheets 40 are arranged, in a stacked manner, on the light guide plate 10 such that edges of the plurality of optical sheets 40 are stacked on each other in a stairway-like arrangement. The backlight module further comprises a first double-sided adhesive tape 50 and a second double-sided adhesive tape 60. The first double-sided adhesive tape 50 is adhesively bonded between the light guide plate 10 and a bottom surface of the circuit board 22. The first double-sided adhesive tape 50 comprises an edge section and the edge section is adhesively attached to a bottommost one 42 of the optical sheets. In other words, the first double-sided adhesive tape 50 extends to a top surface of an edge portion of the bottommost optical sheet 42 so as to fix, through adhesion, the bottommost optical sheet 42. The second double-sided adhesive tape 60 is adhesively attached to a top surface of the circuit board 22, the edge section of the first double-sided adhesive tape 50, and edge portions of other sheets 44, 46 of the optical sheets 40 except the bottommost sheet.
[00026] The present invention is structured such that the edge portions of the plurality of optical sheets 40 are stacked on each other to show a stairway like arrangement and the first double-sided adhesive tape 50 is adhesively bonded between the light guide plate 10 and the circuit board 22, with an edge section of the first double-sided adhesive tape 50 adhesively attached to the bottommost optical sheet 42, and the second double-sided adhesive tape 60 is adhesively attached to a top surface of the circuit board 22, the edge section of the first double-sided adhesive tape 50, and the edge portions of the other sheets of the optical sheets 40 except the bottommost sheet. Such an arrangement has a simple configuration and provides an advantage of easy assembly of the backlight module with a display device.
[00027] Specifically, the edge frame 30 comprises a first positioning surface 32 and a second positioning surface 34 that are arranged in a step-like form. The first positioning surface 32 is located on an inner circumference of the second positioning surface 34 and the first positioning surface 32 is substantially flush with an edge portion of the light guide plate 10. The bottom surface of the circuit board 22 is fixed, through the first double-sided adhesive tape 50, to the first positioning surface 32 and the edge portion of the light guide plate 10. The second positioning surface 34 is substantially flush with the top surface of the circuit board 22.
[00028] The backlight module of the present invention further comprises a back board 70. The back board 70 comprises a bottom plate 72 and an outer wall 74. The outer wall 74 extends vertically from an edge of the bottom plate 72. The edge frame 30 is fixed, together with the light guide plate 10, the optical sheets 40, and the light source assembly 20, to the back board 70. The outer wall 74 has a top surface that is substantially flush with the second positioning surface 34.
[00029] In an embodiment, the backlight module further comprises a reflection sheet 80. The reflection sheet 80 is arranged between the light guide plate 10 and the bottom plate 72.
[00030] In another embodiment, the light guide plate 10 has a bottom surface that is coated with a reflective coating layer. The reflective coating layer is set on contact engagement with the bottom plate 72. In other words, the reflective coating layer is provided to replace the reflection sheet 80, and this helps reduce the size of the backlight module.
[00031] In the backlight module of the present invention, the first double-sided adhesive tape 50 and the second double-sided adhesive tape 60 are both light-shielding double-sized adhesive tapes. Light-shielding double-sized adhesive tapes help prevent light leaking at edges of the backlight module.
[00032] Specifically, the number of the optical sheets 40 is three; and the edge section of the first double-sided adhesive tape 50 is adhesively attached to the bottommost optical sheet 42, and a top surface of the edge section of the first double-sided adhesive tape 50 is substantially flush with a top surface of a middle one 44 of the optical sheets.
[00033] The present invention also provides a display device. The display device comprises the above-described backlight module and a display panel. The display panel is arranged above the backlight module and a top surface of the second double-sided adhesive tape 60 is adhesively attached to the display panel.
[00034] The above illustrates preferred embodiments of the present invention. However, it is noted that those skilled in the art would appreciate that various improvements and modifications are still available without departing from the principle of the present invention and such improvements and modifications are considered within the scope of protection of the present invention.

Claims (14)

CLAIMS:
1. A backlight module, comprising a light guide plate, a light source assembly, an edge frame, and a number of optical sheets, the edge frame surrounding the light guide plate, the light source assembly being arranged between an edge portion of the light guide plate and the edge frame, the light source assembly comprising a circuit board and a light emission element, the light emission element being located between the light guide plate and the edge frame, the circuit board being located above the edge portion of the light guide plate, the optical sheets being arranged, in a stacked manner, on the light guide plate, characterized in that the backlight module further comprises a first double-sided adhesive tape and a second double-sided adhesive tape, the number of optical sheets having edge portions that are stacked in a stairway-like arrangement, the first double-sided adhesive tape being adhesively bonded between the light guide plate and a bottom surface of the circuit board, the first double-sided adhesive tape comprising an edge section, the edge section being adhesively attached to a bottommost one of the optical sheets, the second double-sided adhesive tape being adhesively attached to a top surface of the circuit board, the edge section of the first double-sided adhesive tape, and the edge portions of remaining ones of the optical sheets excluding the bottommost optical sheet.
2. The backlight module as claimed in Claim 1, characterized in that the edge frame comprises a first positioning surface and a second positioning surface that are arranged in a step-like form, the first positioning surface being located on an inner circumference of the second positioning surface, the first positioning surface being substantially flush with the edge portion of the light guide plate, the bottom surface of the circuit board being fixed through the first double-sided adhesive tape to the first positioning surface and the edge portion of the light guide plate, the second positioning surface being substantially flush with the top surface of the circuit board.
3. The backlight module as claimed in Claim 2, characterized in that the backlight module further comprises a back board, the back board comprising a bottom plate and an outer wall, the outer wall extending vertically from an edge of the bottom plate, the edge frame being fixed, together with the light guide plate, the optical sheets, and the light source assembly, to the back board, the outer wall having a top surface that is substantially flush with the second positioning surface.
4. The backlight module as claimed in Claim 3, characterized in that the backlight module further comprises a reflection sheet, the reflection sheet being arranged between the light guide plate and the bottom plate.
5. The backlight module as claimed in Claim 3, characterized in that the light guide plate has a bottom surface that is coated with a reflective coating layer, the reflective coating layer being set in contact engagement with the bottom plate.
6. The backlight module as claimed in Claim 1, characterized in that the first double-sided adhesive tape and the second double-sided adhesive tape are both a light-shielding double-sized adhesive tape.
7. The backlight module as claimed in Claim 1, characterized in that the number of the optical sheets is three; and the edge section of the first double-sided adhesive tape that is adhesively attached to the bottommost one of the optical sheets has a top surface that is substantially flush with a top surface of a middle one of the optical sheets.
8. A display device, characterized in that the display device comprises a backlight module and a display panel, the backlight module comprising a light guide plate, a light source assembly, an edge frame, and a number of optical sheets, the edge frame surrounding the light guide plate, the light source assembly being arranged between an edge portion of the light guide plate and the edge frame, the light source assembly comprising a circuit board and a light emission element, the light emission element being located between the light guide plate and the edge frame, the circuit board being located above the edge portion of the light guide plate, the optical sheets being arranged, in a stacked manner, on the light guide plate, the backlight module further comprising a first double-sided adhesive tape and a second double-sided adhesive tape, the number of optical sheets having edge portions that are stacked in a stairway-like arrangement, the first double-sided adhesive tape being adhesively mounted between the light guide plate and a bottom surface of the circuit board, the first double-sided adhesive tape comprising an edge section , the edge section being adhesively attached to a bottommost one of the optical sheets, the second double-sided adhesive tape being adhesively attached to a top surface of the circuit board, the edge section of the first double-sided adhesive tape, and the edge portion of remaining ones of the optical sheets excluding the bottommost optical sheet, the display panel being arranged above the backlight module, a top surface of the second double-sided adhesive tape being adhesively attached to the display panel.
9. The display device as claimed in Claim 8, characterized in that the edge frame comprises a first positioning surface and a second positioning surface that are arranged in a step-like form, the first positioning surface being located on an inner circumference of the second positioning surface, the first positioning surface being substantially flush with the edge portion of the light guide plate, the bottom surface of the circuit board being fixed through the first double-sided adhesive tape to the first positioning surface and the edge portion of the light guide plate, the second positioning surface being substantially flush with the top surface of the circuit board.
10. The display device as claimed in Claim 9, characterized in that the backlight module further comprises a back board, the back board comprising a bottom plate and an outer wall, the outer wall extending vertically from an edge of the bottom plate, the edge frame being fixed, together with the light guide plate, the optical sheets, and the light source assembly, to the back board, the outer wall having a top surface that is substantially flush with the second positioning surface.
11. The display device as claimed in Claim 10, characterized in that the backlight module further comprises a reflection sheet, the reflection sheet being arranged between the light guide plate and the bottom plate.
12. The display device as claimed in Claim 10, characterized in that the light guide plate has a bottom surface that is coated with a reflective coating layer, the reflective coating layer being set in contact engagement with the bottom plate.
13. The display device as claimed in Claim 8, characterized in that the first double-sided adhesive tape and the second double-sided adhesive tape are both a light-shielding double-sized adhesive tape.
14. The display device as claimed in Claim 8, characterized in that the number of the optical sheets is three; and the edge section of the first double-sided adhesive tape that is adhesively attached to the bottommost one of the optical sheets has a top surface that is substantially flush with a top surface of a middle one of the optical sheets.
GB1706598.8A 2014-11-17 2014-11-29 Backlight module and display device Expired - Fee Related GB2546678B (en)

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CN201410654607.1A CN104456302B (en) 2014-11-17 2014-11-17 Backlight module and display
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3486561A3 (en) * 2017-11-20 2019-08-07 Beijing Xiaomi Mobile Software Co., Ltd. Backlight module and display device
US11209695B2 (en) 2017-11-24 2021-12-28 Japan Display Inc. Backlight device and a liquid crystal display device

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102367068B1 (en) * 2015-03-31 2022-02-24 삼성전자주식회사 Display apparatus
CN104832835B (en) * 2015-04-29 2017-06-16 武汉华星光电技术有限公司 Backlight module and display
CN105044981B (en) * 2015-08-10 2018-03-02 武汉华星光电技术有限公司 A kind of backlight module and liquid crystal display device
CN105042427B (en) * 2015-08-13 2017-05-17 武汉华星光电技术有限公司 Backlight module and display device
CN105650542B (en) 2016-01-04 2019-03-01 京东方光科技有限公司 Backlight module and display device
CN106970485B (en) * 2017-02-28 2020-07-10 惠州Tcl移动通信有限公司 Display device
CN107102478A (en) * 2017-06-30 2017-08-29 武汉华星光电技术有限公司 Liquid crystal display and its backlight module
US10634838B2 (en) 2017-06-30 2020-04-28 Wuhan China Star Optoelectronics Technology Co., Ltd. Liquid crystal display and backlight module thereof
CN109404774A (en) * 2017-08-15 2019-03-01 元太科技工业股份有限公司 Water-proof illuminant module and display device
CN108169951B (en) * 2018-01-03 2021-02-02 京东方科技集团股份有限公司 Display module, manufacturing method thereof and display device
CN108563073B (en) * 2018-05-28 2024-04-26 江苏聚泰科技有限公司 Step-shaped backlight module with limiting assembly
CN113433738A (en) * 2021-07-07 2021-09-24 武汉华星光电技术有限公司 Backlight module and display terminal
CN113759606A (en) * 2021-09-13 2021-12-07 京东方科技集团股份有限公司 Backlight module and display device
CN115592740A (en) * 2022-10-17 2023-01-13 深圳市南极光电子科技股份有限公司（Cn） Backlight reflecting surface back glue structure, cutting method and display panel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201401701Y (en) * 2009-05-13 2010-02-10 厦门高卓立科技有限公司 Backlight modular structure of liquid crystal display
JP2011191444A (en) * 2010-03-12 2011-09-29 Omron Corp Liquid crystal display module
CN202955582U (en) * 2012-12-14 2013-05-29 厦门天马微电子有限公司 Backlight module and liquid crystal display device
CN203036402U (en) * 2012-12-26 2013-07-03 上海中航光电子有限公司 Backlight module and liquid crystal display device
CN203082680U (en) * 2012-11-30 2013-07-24 京东方科技集团股份有限公司 Backlight module and display device using same

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005243572A (en) 2004-02-27 2005-09-08 Optrex Corp Backlight unit and method of fixing film member
EP1890186B1 (en) * 2005-05-30 2014-01-15 Kyocera Corporation Liquid crystal display device
JP4238880B2 (en) * 2006-04-03 2009-03-18 エプソンイメージングデバイス株式会社 Illumination device and liquid crystal display device
JP2009025602A (en) * 2007-07-20 2009-02-05 Citizen Electronics Co Ltd Pressure-sensitive adhesive double coated tape for liquid crystal cell adhesion, backlight unit, liquid crystal display device and method for manufacturing liquid crystal display device
JP5091602B2 (en) 2007-09-25 2012-12-05 株式会社ジャパンディスプレイセントラル Surface light source device and liquid crystal display device using the same
JP5287415B2 (en) * 2009-03-27 2013-09-11 カシオ計算機株式会社 Backlit LCD module
JP5663434B2 (en) * 2011-08-15 2015-02-04 株式会社ジャパンディスプレイ Display device
CN203745771U (en) * 2013-05-24 2014-07-30 上海天马微电子有限公司 Backlight module and liquid crystal display device
CN203757522U (en) * 2014-03-31 2014-08-06 北京京东方茶谷电子有限公司 Backlight module and display device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201401701Y (en) * 2009-05-13 2010-02-10 厦门高卓立科技有限公司 Backlight modular structure of liquid crystal display
JP2011191444A (en) * 2010-03-12 2011-09-29 Omron Corp Liquid crystal display module
CN203082680U (en) * 2012-11-30 2013-07-24 京东方科技集团股份有限公司 Backlight module and display device using same
CN202955582U (en) * 2012-12-14 2013-05-29 厦门天马微电子有限公司 Backlight module and liquid crystal display device
CN203036402U (en) * 2012-12-26 2013-07-03 上海中航光电子有限公司 Backlight module and liquid crystal display device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3486561A3 (en) * 2017-11-20 2019-08-07 Beijing Xiaomi Mobile Software Co., Ltd. Backlight module and display device
US10823908B2 (en) 2017-11-20 2020-11-03 Beijing Xiaomi Mobile Software Co., Ltd. Backlight module and display device
US11209695B2 (en) 2017-11-24 2021-12-28 Japan Display Inc. Backlight device and a liquid crystal display device
US11686972B2 (en) 2017-11-24 2023-06-27 Japan Display Inc. Backlight device
US11874553B2 (en) 2017-11-24 2024-01-16 Japan Display Inc. Backlight device

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CN104456302A (en) 2015-03-25
JP2017534152A (en) 2017-11-16
JP6440227B2 (en) 2018-12-19
KR20170084302A (en) 2017-07-19
WO2016078127A1 (en) 2016-05-26
KR102010164B1 (en) 2019-08-12
GB201706598D0 (en) 2017-06-07
CN104456302B (en) 2017-03-08

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