WO2018201719A1 - 一种背光模组及显示装置 - Google Patents

一种背光模组及显示装置 Download PDF

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Publication number
WO2018201719A1
WO2018201719A1 PCT/CN2017/115287 CN2017115287W WO2018201719A1 WO 2018201719 A1 WO2018201719 A1 WO 2018201719A1 CN 2017115287 W CN2017115287 W CN 2017115287W WO 2018201719 A1 WO2018201719 A1 WO 2018201719A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
backlight module
attached
plastic frame
light
Prior art date
Application number
PCT/CN2017/115287
Other languages
English (en)
French (fr)
Inventor
冯艳玲
唐乌力吉白尔
郝瑞军
连龙
赵忠平
Original Assignee
京东方科技集团股份有限公司
鄂尔多斯市源盛光电有限责任公司
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 京东方科技集团股份有限公司, 鄂尔多斯市源盛光电有限责任公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/067,079 priority Critical patent/US11092736B2/en
Publication of WO2018201719A1 publication Critical patent/WO2018201719A1/zh

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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
    • 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
    • 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
    • G02B6/0051—Diffusing 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
    • G02B6/0033—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
    • G02B6/0053—Prismatic sheet or layer; Brightness enhancement 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
    • G02B6/0033—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
    • G02B6/0066—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
    • G02B6/0086—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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/08—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00 light absorbing layer
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/28—Adhesive materials or arrangements

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a backlight module and a display device.
  • the display device includes a display panel and a backlight module.
  • the backlight module includes a plastic frame, a reflective sheet, a light guide plate, and the like.
  • the light-shielding tape is attached to the edge of the surface of the plastic frame adjacent to the display panel to be in the backlight module. The device is bonded and fixed.
  • An embodiment of the present disclosure provides a backlight module including a backlight assembly and a light shielding tape attached to an edge of the backlight assembly, the backlight assembly including an upper surface, a lower surface, and a side surface between the upper surface and the lower surface.
  • the light shielding tape includes a first attaching portion, a second attaching portion and a third attaching portion which are continuously disposed, wherein the first attaching portion is attached to the upper surface of the backlight assembly, and the second attaching portion is attached to the backlight The side of the assembly and the third attachment portion are attached to the lower surface of the backlight assembly.
  • the backlight assembly includes a plastic frame, the first attaching portion is attached to the upper surface of the plastic frame, the second attaching portion is attached to the side of the plastic frame, and the third attaching portion is attached to the plastic frame. surface.
  • the backlight module further includes a reflective sheet under the plastic frame, the third attaching portion of the light shielding tape has a double-sided adhesive layer, and the third attaching portion respectively bonds the lower surface of the plastic frame and the reflective sheet.
  • the backlight module further includes a light guide plate, a diffusion sheet, a lower prism and an upper prism disposed on one side of the plastic frame and sequentially disposed on the reflective sheet, and the first attaching portion is further attached to the upper surface of the upper prism. Part of the box.
  • the backlight module further includes a light emitting device disposed between the plastic frame and the light guide plate
  • the plastic frame includes a first frame and a second frame disposed in parallel with the light emitting device, and a third frame disposed perpendicular to the first frame
  • the fourth frame wherein the first frame is on the opposite side of the light emitting device, and the second frame is on the same side of the light emitting device.
  • the first frame, the second frame, the third frame and the fourth frame together form a plastic frame of a rectangular structure.
  • the length of the light-shielding tape attached to the first frame and the second frame respectively is less than or equal to the width of the reflective sheet in the backlight module.
  • the length of the light-shielding tape attached to the third frame and the fourth frame respectively is less than or equal to the length of the reflective sheet in the backlight module.
  • At least two retaining wall structures are disposed on the second frame, and the at least two retaining wall structures are respectively located at two ends of the second frame adjacent to the third frame and the fourth frame respectively, and the light shielding tape is not attached to The at least two retaining wall structures.
  • the backlight assembly includes a plastic frame and a back plate located on a side of the plastic frame and below the plastic frame, the first attaching portion is attached to the upper surface of the plastic frame, and the second attaching portion is attached to The side of the backboard, and the third attachment portion is attached to the lower surface of the back panel.
  • the backlight module further includes a reflective sheet disposed between the lower surface of the plastic frame and the back plate, and a light guide plate, a diffusion sheet, a lower prism, and a light guide plate disposed on one side of the plastic frame and disposed on the reflective sheet from bottom to top.
  • the upper prism is attached to a portion of the upper surface of the upper prism adjacent to the plastic frame.
  • the backlight assembly further includes a light emitting device disposed between the plastic frame and the light guide plate
  • the plastic frame includes a first frame and a second frame disposed in parallel with the light emitting device, and a third frame and a first direction perpendicular to the first frame
  • the first frame is on the opposite side of the light emitting device
  • the second frame is on the same side of the light emitting device.
  • the first frame, the second frame, the third frame and the fourth frame together form a plastic frame of a rectangular structure.
  • the length of the light-shielding tape attached to the first frame and the second frame respectively is less than or equal to the width of the reflective sheet in the backlight module.
  • the length of the light-shielding tape attached to the third frame and the fourth frame respectively is less than or equal to the length of the reflective sheet in the backlight module.
  • the second frame is provided with at least two retaining wall structures, at least two retaining walls
  • the structures are respectively located at two ends of the second frame adjacent to the third frame and the fourth frame, and the light shielding tape is not attached to the at least two retaining wall structures.
  • the backlight module further includes a flexible circuit board, and the light shielding tape has an opening under the flexible circuit board.
  • the light-shielding tape comprises a plurality of tape segments disposed at intervals along the backlight assembly.
  • the light-shielding tape has an indentation at a boundary position of the first attaching portion, the second attaching portion, and the third attaching portion.
  • Another aspect of the embodiments of the present disclosure provides a display device including the backlight module of the first aspect.
  • FIG. 1A is a schematic overall structural diagram of a backlight module according to an embodiment of the present disclosure
  • FIG. 1B is a schematic structural diagram of an entire backlight module according to another embodiment of the present disclosure.
  • FIG. 2A is a schematic view showing a manner of attaching a light-shielding tape in a backlight module according to an embodiment of the present disclosure
  • 2B is a schematic diagram of attaching a light shielding tape in a backlight module according to another embodiment of the present disclosure
  • FIG. 3 is a front view of a backlight module according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of attaching a light-shielding tape in a backlight module according to another embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of attaching a light-shielding tape in a backlight module according to still another embodiment of the present disclosure
  • FIG. 6 is a schematic view showing a manner of attaching a light-shielding tape in a backlight module according to still another embodiment of the present disclosure
  • FIG. 7 is a cross-sectional view of a backlight module according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic diagram showing a part of a structure of a backlight module according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram showing a part of a structure of a backlight module according to another embodiment of the present disclosure.
  • FIG. 10 is a schematic diagram of a manner of attaching a light-shielding tape in a backlight module according to still another embodiment of the present disclosure.
  • Figure 11 is a schematic view showing an arrangement of the light-shielding tape of Figure 2A;
  • FIG. 12 is a schematic diagram of a display device according to an embodiment of the present disclosure.
  • the display panel tends to have a large display area, a narrow bezel, and a thin thickness.
  • the light-shielding tape may block a part of the visible area due to its excessive width.
  • the width of the light-shielding tape is generally reduced.
  • the overlapping area of the light-shielding tape with a reduced width and the plastic frame is small, that is, the bonding area between the light-shielding tape and the plastic frame is reduced. Therefore, when the display device is subjected to the reliability test or during the manufacturing process of the backlight module, the problem that the light-shielding tape is separated from the plastic frame may occur.
  • the backlight module includes an upper prism arranged in order from top to bottom. 02, lower prism 03, diffusion sheet 04, light guide plate 05, and reflection sheet 07.
  • the backlight module further includes a plastic frame 06 that can be disposed around the upper prism 02, the lower prism 03, the diffusion sheet 04, the light guide plate 05, and the reflection sheet 07, and surrounds the components.
  • a plastic frame 06 that can be disposed around the upper prism 02, the lower prism 03, the diffusion sheet 04, the light guide plate 05, and the reflection sheet 07, and surrounds the components.
  • the backlight module further includes a light emitting device, and the light emitting device can be disposed between the plastic frame 06 and the light guide plate 05.
  • the light emitting device is the LED light 08.
  • the light emitting device may also be disposed between the light guide plate 07 and the reflection sheet 07.
  • the backlight module further includes a light-shielding tape 01 attached to the plastic frame 06.
  • the LED lamp 08 is disposed on the side of the backlight module.
  • the backlight module can have the advantages of light weight, thin shape, narrow frame, and low power consumption, so it can be applied to mobile phones and tablets. , laptop or large size TV.
  • the light guide plate 05 is used to guide the scattering direction of the light, thereby improving the display brightness of the display panel and the uniformity of the display brightness.
  • the upper prism 02 and the lower prism 03 are placed between the diffusion sheet 04 in the backlight module and the display panel for improving the angular distribution of the light.
  • the upper prism 02 and the lower prism 03 converge the light uniformly emitted from the diffusion sheet 04 to the respective angles to the axial angle, that is, the front view angle, thereby improving the axial direction without increasing the total luminous flux.
  • the reflection sheet 07 can increase the reflectance of the lamp reflection sheet or the bottom reflection sheet, thereby further improving brightness and energy efficiency without colliding with other brightness enhancement techniques.
  • the backlight module of the present application is described as an example of a side-lit backlight module in which the display device is disposed on the side of the backlight module.
  • the direct-lit backlight module can be disposed between the light guide plate and the reflective sheet. Refer to the related structure of the side-entry backlight module, which will not be described in detail herein.
  • the backlight module includes a backlight assembly and a light shielding tape 01 attached to an edge of the backlight assembly.
  • the backlight assembly includes an upper surface, a lower surface, and a side surface disposed between the upper surface and the lower surface.
  • the light shielding tape 01 includes a first attaching portion 12, a second attaching portion 13, and a third attaching portion 14 which are continuously disposed.
  • the first attaching portion 12 is attached to the upper surface of the backlight assembly
  • the second attaching portion 13 is attached to the side surface of the backlight assembly
  • the third attaching portion 14 is attached to the lower surface of the backlight assembly.
  • the upper side of the backlight module refers to the direction of the backlight module near the display panel.
  • the upper surface of the backlight assembly refers to a surface of the backlight assembly that is close to the display panel
  • the lower surface of the backlight assembly refers to a surface of the backlight assembly that is disposed opposite to the upper surface.
  • the backlight assembly includes a plastic frame 06.
  • the first attaching portion 12 of the light shielding tape 01 is attached to the upper surface of the plastic frame 06, and the second attaching portion 13 is attached. Attached to the side of the frame 06, the third attachment portion 14 is attached to the lower surface of the frame 06.
  • the backlight module further includes a reflective sheet 07 under the plastic frame 06.
  • the third attaching portion 14 of the light-shielding tape 01 may have a double-sided adhesive layer, and the third attaching portion 07 is respectively adhered.
  • the third attaching portion 14 can replace the lower surface of the plastic frame 06 and the reflective sheet 07 in place of the first adhesive in the conventional backlight module, thereby simplifying the structure and assembly process.
  • the gap between the lower surface of the plastic frame 06 and the reflective sheet 07 has the third attaching portion 14 of the light-shielding tape 01, moisture can be prevented from entering the interior of the backlight module during the reliability test, thereby preventing the film and The reflection sheet 07 wrinkles due to moisture.
  • the light shielding tape 01 is a stress relieving type tape.
  • the substrate of the light-shielding tape 01 may be black PET, and the surface may be coated with a transparent colloid.
  • the backlight module further includes a light guide plate 05 , a diffusion sheet 04 , a lower prism 03 , and an upper prism 02 disposed on one side of the plastic frame 06 and sequentially disposed on the reflective sheet 07 .
  • the first attaching portion 12 is also attached to a portion of the upper surface of the upper prism 02 near the plastic frame 06.
  • the backlight assembly includes a plastic frame 06 and a back plate 15 disposed on a side of the plastic frame 06 and below the plastic frame 06.
  • the first attaching portion 12 of the light-shielding tape 01 is attached to the upper surface of the plastic frame 06
  • the second attaching portion 13 is attached to the side surface of the back plate
  • the third attaching portion 14 is attached to the lower surface of the back plate 15. surface.
  • the backlight module further includes a reflective sheet 07 located between the lower surface of the plastic frame 06 and the back plate 15, and disposed on the side of the plastic frame 06 and disposed in order from bottom to top.
  • the light guide plate 05, the diffusion sheet 04, the lower prism 03, and the upper prism 02 on the reflection sheet 07 are also attached to a portion of the upper surface of the upper prism 02 near the plastic frame 06.
  • the light-shielding tape 01 has a pressure at a boundary position of the first attaching portion 12, the second attaching portion 13, and the third attaching portion 14. Trace M to ensure that the light-shielding tape 01 can be bent at the ridge line.
  • the first attaching portion 12 of the light shielding tape 01 is attached to the upper surface of the backlight assembly
  • the second attaching portion 13 is attached to the side surface of the backlight assembly
  • the third attaching portion is attached.
  • 14 is attached to the lower surface of the backlight assembly. That is, the light-shielding tape 01 is attached so as to extend toward the lower surface of the backlight assembly, so that the overlapping area of the light-shielding tape 01 and the backlight assembly can be increased. Therefore, it is possible to solve the problem of insufficient adhesion during assembly due to the small overlapping area of the light-shielding tape 01 and the plastic frame 06 without obstructing the visible area.
  • the light-shielding tape 01 is attached so as to extend toward the lower surface of the backlight assembly, and the width of the light-shielding tape 01 can be increased. In this way, problems such as deformation of the tape can be effectively improved, thereby providing a flatter support surface for the display panel. Moreover, the increase in the width of the light-shielding tape 01 increases the bonding area of the light-shielding tape 01 and the backing plate 15, thereby effectively preventing the backing plate 15 from being separated from other components.
  • FIG. 3 is a front view of the light shielding tape 01 and the plastic frame 06 in the backlight module according to an embodiment of the present disclosure.
  • the bezel 06 includes a first frame 061 and a second frame 062 disposed in parallel with the LED lamp 08. And a third frame 063 and a fourth frame 064 disposed perpendicular to the first frame 061.
  • the first frame 061 is on the opposite side of the LED lamp 08, and the second frame 062 is on the same side of the LED lamp 08.
  • the first frame 061, the second frame 062, the third frame 063, and the fourth frame 064 together form a plastic frame 06 of a rectangular structure.
  • the second frame of the plastic frame 06 At least two retaining wall structures 10 are disposed on the 062.
  • the at least two retaining wall structures 10 are respectively located at two ends of the second frame 062 adjacent to the third frame 063 and the fourth frame 064 respectively.
  • the at least two retaining wall structures 10 are higher than the other frames of the plastic frame 06, so that the internal components of the backlight module can be effectively protected.
  • the light-shielding tape 01 is not attached to the retaining wall structure 10. It should be noted that although the number of the retaining wall structures 10 is shown in FIG. 4, the number of the retaining wall structures 10 in the present invention is not limited thereto.
  • the height and shape of the retaining wall structure are not limited in the embodiment of the present disclosure. As long as it can be disposed on the second frame 062 of the plastic frame 06 to protect the internal components of the backlight module.
  • the length L1 of the reflective sheet 07 in the backlight module is smaller than the length L2 of the plastic frame 06, and the width W1 of the reflective sheet 07 is smaller than the width W2 of the plastic frame 06. .
  • the length of the light-shielding tape 01 attached to the first frame 061 and the second frame 062, respectively, is less than or equal to the width W1 of the reflection sheet 07.
  • the light shielding tape 01 is attached to the third frame 063 and the fourth frame 064, respectively.
  • the length is less than or equal to the length L1 of the reflection sheet 07.
  • FIG. 7 is a cross-sectional view of a backlight module according to an embodiment of the present disclosure.
  • the backlight module includes a light shielding tape 01 , an upper prism sheet 02 , a lower prism sheet 03 , a diffusion sheet 04 , a light guide plate 05 , a plastic frame 06 , a reflection sheet 07 , an LED lamp 08 , and a flexible circuit board 09 .
  • the LED lamp 08 is soldered on the flexible circuit board 09, and the light-shielding tape 01 is avoided to the visible area.
  • the light shielding tape 01 is attached to the outside of the second frame 062 of the plastic frame 06 . Since the flexible circuit board 09 will exceed a portion of the length of the third frame 063 or the fourth frame 064 of the frame 06 during actual assembly, a window is provided outside the second frame 062 of the frame 06 to accommodate the flexible circuit board 09. The opaque tape evades the fenestration when attached to the outside of the second frame 062 of the frame 06.
  • FIG. 9 shows a schematic view of the assembly of the light-shielding tape and the plastic frame, with an opening 11 outside the second frame 062 of the plastic frame 06.
  • the light-shielding tape 01 includes a plurality of tape segments disposed at intervals along the backlight assembly.
  • the bottom side in Fig. 10 is the LED lamp side.
  • the shape and spacing of the plurality of tape segments included in the light-shielding tape 01 can be set according to the specific shape and spacing of the first backing rubber replaced by the light-shielding tape 01.
  • an embodiment of the present disclosure provides a display device 100 including the backlight module in the embodiment described above.
  • the display device 100 has the same structure and advantageous effects as the backlight module provided by the foregoing embodiments. Since the structure and the beneficial effects of the backlight module have been described in detail in the foregoing embodiments, they are not described herein again.

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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)
  • Microelectronics & Electronic Packaging (AREA)
  • Liquid Crystal (AREA)
  • Planar Illumination Modules (AREA)

Abstract

一种背光模组及显示装置，背光模组包括背光组件和贴附在背光组件边缘上的遮光胶带（01），遮光胶带（01）包括连续设置的第一贴附部（12）、第二贴附部（13）和第三贴附部（14），其中，第一贴附部（12）贴附于背光组件的上表面且第二贴附部（13）贴附于背光组件的侧面、第三贴附部（14）贴附于背光组件的下表面。

Description

一种背光模组及显示装置
本申请要求于2017年5月5日提交中国专利局、申请号为201720494801.7、发明名称为“一种侧入式背光模组及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示技术领域，尤其涉及一种背光模组及显示装置。
背景技术
高性能显示领域通常使用具有体积小、功耗低、无辐射以及制作成本低等特点的显示装置。该显示装置包括显示面板和背光模组，其中，背光模组包括胶框、反射片和导光板等等，遮光胶带粘贴于胶框的邻近显示面板的表面的边缘上，以对背光模组中的器件进行粘接固定。
发明内容
本公开实施例一方面提供了一种背光模组，包括背光组件和贴附在背光组件边缘上的遮光胶带，该背光组件包括上表面、下表面和位于上表面和下表面之间的侧面，该遮光胶带包括连续设置的第一贴附部、第二贴附部和第三贴附部，其中，第一贴附部贴附于背光组件的上表面、第二贴附部贴附于背光组件的侧面且第三贴附部贴附于背光组件的下表面。
可选地，背光组件包括胶框，第一贴附部贴附于胶框的上表面，第二贴附部贴附于胶框的侧面，且第三贴附部贴附于胶框的下表面。
可选地，背光模组还包括位于胶框下方的反射片，遮光胶带的第三贴附部具有双面胶层，第三贴附部分别粘接胶框下表面与反射片。
可选地，背光模组还包括设置在胶框一侧并依次设置在反射片上的导光板、扩散片、下棱镜和上棱镜，第一贴附部还贴附于上棱镜上表面的靠近胶框的一部分上。
可选地，背光模组还包括位于胶框与导光板之间的发光器件，胶框包括与发光器件平行设置的第一边框和第二边框，以及与第一边框垂直设置的第三边框与第四边框，其中第一边框在发光器件的对侧，第二边框在发光器件的同侧，第一边框、第二边框、第三边框以及第四边框共同构成矩形结构的胶框。
可选地，遮光胶带分别在第一边框和第二边框上贴附的长度小于或等于背光模组中的反射片的宽度。
可选地，遮光胶带分别在第三边框和第四边框上贴附的长度小于或等于背光模组中的反射片的长度。
可选地，第二边框上设置有至少两个挡墙结构，所述至少两个挡墙结构分别位于第二边框的分别靠近第三边框和第四边框的两端，遮光胶带不贴附于所述至少两个挡墙结构。
可选地，背光组件包括胶框和位于所述胶框的侧面上及所述胶框下方的背板，第一贴附部贴附于胶框的上表面，第二贴附部贴附于背板的侧面，且第三贴附部贴附于背板的下表面。
可选地，背光模组还包括位于胶框的下表面和背板之间的反射片，和设置在胶框一侧并从下至上依次设置在反射片上的导光板、扩散片、下棱镜和上棱镜，第一贴附部还贴附于上棱镜上表面的靠近胶框的一部分上。
可选地，背光组件还包括位于胶框与导光板之间的发光器件，胶框包括与发光器件平行设置的第一边框和第二边框，以及与第一边框垂直设置的第三边框与第四边框，其中第一边框在发光器件的对侧，第二边框在发光器件的同侧，第一边框、第二边框、第三边框以及第四边框共同构成矩形结构的胶框。
可选地，遮光胶带分别在第一边框和第二边框上贴附的长度小于或等于背光模组中的反射片的宽度。
可选地，遮光胶带分别在第三边框和第四边框上贴附的长度小于或等于背光模组中的反射片的长度。
可选地，第二边框上设置有至少两个挡墙结构，至少两个挡墙 结构分别位于第二边框的分别靠近第三边框与第四边框的两端，遮光胶带不贴附于至少两个挡墙结构。
可选地，背光模组还包括柔性电路板，遮光胶带在柔性电路板下方具有开口。
可选地，遮光胶带包括沿背光组件一周间隔设置的多个胶带段。
可选地，在遮光胶带的厚度基本上大于等于0.05mm的情况下，遮光胶带在第一贴附部、第二贴附部以及第三贴附部的交界位置处具有压痕。
本公开实施例的另一方面，提供了一种显示装置，包括第一方面所述的背光模组。
附图说明
为了更清楚地说明本公开实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1A为本公开一实施例提供的背光模组整体结构示意图；
图1B为本公开另一实施例提供的背光模组整体结构示意图；
图2A为本公开一实施例提供的背光模组中遮光胶带的贴附方式示意图；
图2B为本公开另一实施例提供的背光模组中遮光胶带的贴附方式示意图；
图3为本公开实施例提供的背光模组的主视图；
图4为本公开另一实施例提供的背光模组中遮光胶带的贴附方式示意图；
图5为本公开再一实施例提供的背光模组中遮光胶带的贴附方式示意图；
图6为本公开再一实施例提供的背光模组中遮光胶带的贴附方式示意图；
图7为本公开实施例提供的背光模组的剖面示意图；
图8为本公开一实施例提供的背光模组中部分结构的示意图；
图9为本公开另一实施例提供的背光模组中部分结构的示意图；
图10为本公开再一实施例提供的背光模组中遮光胶带的贴附方式示意图；
图11为图2A中遮光胶带的一种设置方式的示意图；
图12为本公开一实施例提供的显示装置的示意图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
在本公开的描述中，需要理解的是，术语“中心”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本公开和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本公开的限制。
目前，显示面板趋向于具有大显示区、窄边框及薄厚度，此时，遮光胶带会因其宽度过大而遮挡可视区域的一部分。在背光模组的设计中，为防止遮光胶带遮挡可视区域，通常会减小遮光胶带的宽度。然而，宽度减小的遮光胶带与胶框的搭接面积小，也即遮光胶带与胶框之间的粘接面积减小。因此，在对显示装置进行信赖性测试时或者在背光模组的制作过程中，可能出现遮光胶带与胶框分离的问题。
为了解决上述问题，本公开实施例提供了一种背光模组。为了更清楚地理解该背光模组，以下对该背光模组的整体结构进行描述。如图1A和图1B所示，该背光模组包括从上至下依次设置的上棱镜 02、下棱镜03、扩散片04、导光板05、以及反射片07。该背光模组还包括胶框06，该胶框06可设置在该上棱镜02、下棱镜03、扩散片04、导光板05和反射片07的四周，并包围这些组件。此外，如图1A和图7所示，该背光模组还包括发光器件，该发光器件可设置在胶框06与导光板05之间，示例性地，发光器件为LED灯08。此外，如图1B所示，该发光器件也可设置在导光板07和反射片07之间。再次参照图1A和图1B，该背光模组还包括贴附在胶框06上的遮光胶带01。
示例性地，LED灯08设置在背光模组的侧边，以这种方式，该背光模组可拥有轻量、薄型、窄框化以及低耗电的优点，因此可应用于手机、平板电脑、笔记型电脑或者大尺寸电视中。导光板05用于引导光的散射方向，从而可提高显示面板的显示亮度以及显示亮度的均匀性。上棱镜02和下棱镜03放置在背光模组中的扩散片04与显示面板之间，用于改善光的角分布。例如，上棱镜02和下棱镜03将从扩散片04射出的均匀地向各个角度发散的光汇聚到轴向角度上，即正视角度上，从而可在不增加出射总光通量的情况下提高轴向亮度。反射片07可以提高灯管反射片或者底反射片的反射率，从而能够在与其他增亮技术不冲突的情况下进一步提高亮度和能效。
以下以显示器件设置在背光模组的侧边时的侧入式背光模组为例对本申请的背光模组进行说明，显示器件设置在导光板和反射片之间时的直下式背光模组可参照侧入式背光模组的相关结构，本文不再赘述。
以下参照图1A、图2A和图2B，对本公开实施例提供的背光模组的细节进行说明。如图1A所示，该背光模组包括背光组件和贴附在背光组件边缘上的遮光胶带01。如图2A和2B所示，背光组件包括上表面、下表面和设置在上表面和下表面之间的侧面。遮光胶带01包括连续设置的第一贴附部12、第二贴附部13和第三贴附部14。第一贴附部12贴附于背光组件的上表面、第二贴附部13贴附于背光组件的侧面、第三贴附部14贴附于背光组件的下表面。
需要说明的是，本公开实施例中提供的背光模组中的上方是指该背光模组的靠近显示面板的方向。具体地，所述的背光组件的上表面是指背光组件的靠近显示面板的表面，背光组件的下表面是指背光组件的与上表面相对设置的表面。
在本公开的一个实施例中，如图2A所示，背光组件包括胶框06，该遮光胶带01的第一贴附部12贴附于胶框06的上表面，第二贴附部13贴附于胶框06的侧面，第三贴附部14贴附于胶框06的下表面。
示例性地，如图2A所示，背光模组还包括位于胶框06下方的反射片07，遮光胶带01的第三贴附部14可具有双面胶层，第三贴附部07分别粘接胶框06的下表面与反射片07。如此设置，第三贴附部14可代替传统背光模组中的第一背胶，分别粘接胶框06的下表面与反射片07，因而能够简化结构和组装工艺。此外，由于胶框06的下表面与反射片07之间的间隙中具有遮光胶带01的第三贴附部14，因此可避免信赖性测试时水汽进入背光模组内部，进而可避免膜材及反射片07因水汽而出现褶皱。
示例性地，遮光胶带01为应力缓和型胶带。此时，遮光胶带01的基材可为黑色PET，且表面可涂有透明胶体。如此设置，可通过黑色PET吸收入射到胶框06的下表面与反射片07之间的光，从而可以有效防止LED灯08发出的光从胶框06的下表面与反射片07之间漏出。
示例性地，如图2A和图7所示，背光模组还包括设置在胶框06一侧并依次设置在反射片07上的导光板05、扩散片04、下棱镜03和上棱镜02，第一贴附部12还贴附于上棱镜02上表面的靠近胶框06的一部分上。
在本公开的另一实施例中，如图2B所示，背光组件包括胶框06和设置在胶框06的侧面上和胶框06下方的背板15。该遮光胶带01的第一贴附部12贴附于胶框06的上表面，第二贴附部13贴附于背板15的侧面，第三贴附部14贴附于背板15的下表面。
示例性地，如图1A和图2B所示，背光模组还包括位于胶框06下表面和背板15之间的反射片07，和设置在胶框06一侧并从下至上依次设置在反射片07上的导光板05、扩散片04、下棱镜03和上棱镜02，第一贴附部12还贴附于上棱镜02上表面的靠近胶框06的一部分上。
通常，在遮光胶带01的厚度T大于或者等于0.05mm的情况下，遮光胶带01在胶框06的棱线处不易弯折。为改善以上情况，在本公开的一个实施例中，如图11所示，遮光胶带01在第一贴附部12、第二贴附部13以及第三贴附部14的交界位置处具有压痕M，以保证遮光胶带01可在棱线处弯折。
本公开实施例提供的背光模组中，遮光胶带01的第一贴附部12贴附于背光组件的上表面，第二贴附部13贴附于背光组件的侧面，且第三贴附部14贴附于背光组件的下表面。也就是说，该遮光胶带01以向背光组件的下表面延伸的方式进行贴附，从而可以增加遮光胶带01与背光组件的搭接面积。因此，可以在不遮挡可视区域的前提下，解决因遮光胶带01与胶框06搭接面积小所导致组装过程中粘性不足等问题。此外，遮光胶带01以向背光组件的下表面延伸的方式进行贴附，可使遮光胶带01的宽度增加。以这种方式，可有效改善胶带变形等问题，从而可给显示面板提供更加平整的支撑面。并且，遮光胶带01的宽度增加可增大遮光胶带01与背板15的粘接面积，从而有效防止背板15与其他组件分离。
图3示出了本公开一实施例提供的背光模组中的遮光胶带01与胶框06的主视图。如图3所示，在显示器件(例如LED灯08)位于胶框06与导光板15之间的情况下，胶框06包括与LED灯08平行设置的第一边框061和第二边框062，以及与第一边框061垂直设置的第三边框063和第四边框064。其中第一边框061在LED灯08的对侧，第二边框062在LED灯08的同侧。第一边框061、第二边框062、第三边框063以及第四边框064共同构成矩形结构的胶框06。
在本公开的一个实施例中，如图4所示，在胶框06的第二边框 062上设置有至少两个挡墙结构10。所述至少两个挡墙结构10分别位于第二边框062的分别靠近第三边框063和第四边框064的两端。所述至少两个挡墙结构10均高于胶框06的其它边框，因而可以有效地对背光模组内部器件进行保护。遮光胶带01不贴附于挡墙结构10。需要说明的是，虽然图4中示出了挡墙结构10的数量是两个，但是本发明中挡墙结构10的数量不限于此。
此外，本公开实施例对挡墙结构的高度与形状均不作限定。只要能够设置在胶框06的第二边框062上以对背光模组内部器件进行保护即可。
在本公开的一个实施例中，如图5和图6所示，背光模组中反射片07的长度L1小于胶框06的长度L2，且反射片07的宽度W1小于胶框06的宽度W2。遮光胶带01分别在第一边框061和第二边框062上贴附的长度小于或等于反射片07的宽度W1。
在本公开的一个实施例中，参照图6所示，在反射片07的长度L1小于胶框06的长度L2的情况下，遮光胶带01分别在第三边框063与第四边框064上贴附的长度小于或等于反射片07的长度L1。
根据上述遮光胶带01的贴附长度限定，可以保证组装反射片07时有足够的定位基准又不至于使遮光胶带01与胶框06分离。
图7示出了本公开一实施例提供的背光模组的剖面图。如图7所示，该背光模组包括遮光胶带01、上棱镜片02、下棱镜片03、扩散片04、导光板05、胶框06、反射片07、LED灯08和柔性电路板09。其中，LED灯08焊接在柔性电路板09上，遮光胶带01对可视区域避让。
在本公开的一个实施例中，如图8所示，当胶框06不具有挡墙结构10时，遮光胶带01贴附于胶框06的第二边框062外侧。由于柔性电路板09会在实际组装时超出胶框06第三边框063或第四边框064长度的一部分，因此在胶框06的第二边框062外侧设置有一开窗以容纳柔性电路板09。遮光胶带在贴附于胶框06的第二边框062外侧时避让此开窗。
在一示例中，由于背光组件长时间工作温度将处于较高状态，因此在背光组件中的柔性电路板09下方具有开口11，该开口11可以对背光组件进行散热。遮光胶带01在贴附于胶框06的第二边框062外侧时也应该对应此开口11予以避让。图9示出了遮光胶带与胶框装配的示意图，其中在胶框06的第二边框062外侧具有开口11。
在本公开的一个实施例中，如图10所示，遮光胶带01包括沿背光组件一周间隔设置多个胶带段。图10中的底侧为LED灯侧。该遮光胶带01所包括的多个胶带段的形状和间隔可根据遮光胶带01所替代的第一背胶的具体形状和间隔进行设置。
如图11所示，本公开实施例提供了一种显示装置100，该显示装置100包括如上所述实施例中的背光模组。由此，该显示装置100具有与前述实施例提供的背光模组相同的结构和有益效果。由于前述实施例已经对该背光模组的结构和有益效果进行了详细的描述，因此此处不再赘述。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (18)

  1. 一种背光模组，包括背光组件和贴附在所述背光组件边缘上的遮光胶带，所述背光组件包括上表面、下表面和位于所述上表面和所述下表面之间的侧面，所述遮光胶带包括连续设置的第一贴附部、第二贴附部和第三贴附部，其中，所述第一贴附部贴附于所述背光组件的上表面、所述第二贴附部贴附于所述背光组件的侧面且所述第三贴附部贴附于所述背光组件的下表面。
  2. 根据权利要求1所述的背光模组，其中，所述背光组件包括胶框，所述第一贴附部贴附于所述胶框的上表面，所述第二贴附部贴附于所述胶框的侧面，且所述第三贴附部贴附于所述胶框的下表面。
  3. 根据权利要求2所述的背光模组，其中，所述背光模组还包括位于所述胶框下方的反射片，所述遮光胶带的第三贴附部具有双面胶层，所述第三贴附部分别粘接所述胶框的下表面与所述反射片。
  4. 根据权利要求3所述的背光模组，其中，所述背光模组还包括设置在所述胶框一侧并依次设置在所述反射片上的导光板、扩散片、下棱镜和上棱镜，所述第一贴附部还贴附于所述上棱镜上表面的靠近所述胶框的一部分上。
  5. 根据权利要求4所述的背光模组，其中，所述背光模组还包括位于所述胶框与所述导光板之间的发光器件，所述胶框包括与所述发光器件平行设置的第一边框和第二边框，以及与所述第一边框垂直设置的第三边框与第四边框，其中所述第一边框在所述发光器件的对侧，所述第二边框在所述发光器件的同侧，所述第一边框、第二边框、第三边框以及第四边框共同构成矩形结构的胶框。
  6. 根据权利要求5所述的背光模组，其中，所述遮光胶带分别在所述第一边框和所述第二边框上贴附的长度小于或等于所述背光模组中的反射片的宽度。
  7. 根据权利要求5所述的背光模组，其中，所述遮光胶带分别在所述第三边框和所述第四边框上贴附的长度小于或等于所述背光模组中的反射片的长度。
  8. 根据权利要求5所述的背光模组，其中，所述第二边框上设置有至少两个挡墙结构，所述至少两个挡墙结构分别位于所述第二边框的分别靠近所述第三边框和所述第四边框的两端，所述遮光胶带不贴附于所述至少两个挡墙结构。
  9. 根据权利要求1所述的背光模组，其中，所述背光组件包括胶框和位于所述胶框的侧面上及所述胶框下方的背板，所述第一贴附部贴附于所述胶框的上表面，所述第二贴附部贴附于所述背板的侧面，且所述第三贴附部贴附于所述背板的下表面。
  10. 根据权利要求9所述的背光模组，其中，所述背光模组还包括位于所述胶框的下表面和所述背板之间的反射片，和设置在所述胶框一侧并从下至上依次设置在所述反射片上的导光板、扩散片、下棱镜和上棱镜，所述第一贴附部还贴附于所述上棱镜上表面的靠近所述胶框的一部分上。
  11. 根据权利要求10所述的背光模组，其中，所述背光模组还包括位于所述胶框与所述导光板之间的发光器件，所述胶框包括与所述发光器件平行设置的第一边框和第二边框，以及与所述第一边框垂直设置的第三边框与第四边框，其中所述第一边框在所述发光器件的对侧，所述第二边框在所述发光器件的同侧，所述第一边框、第二边框、第三边框以及第四边框共同构成矩形结构的胶框。
  12. 根据权利要求11所述的背光模组，其中，所述遮光胶带分别在所述第一边框和所述第二边框上贴附的长度小于或等于所述背光模组中的反射片的宽度。
  13. 根据权利要求11所述的背光模组，其中，所述遮光胶带分别在所述第三边框和所述第四边框上贴附的长度小于或等于所述背光模组中的反射片的长度。
  14. 根据权利要求11所述的背光模组，其中，所述第二边框上设置有至少两个挡墙结构，所述至少两个挡墙结构分别位于所述第二边框的分别靠近所述第三边框和所述第四边框的两端，所述遮光胶带不贴附于所述至少两个挡墙结构。
  15. 根据权利要求1所述的背光模组，其中，所述背光模组还包括柔性电路板，所述遮光胶带在所述柔性电路板的下方具有开口。
  16. 根据权利要求1所述的背光模组，其特征在于，所述遮光胶带包括沿所述背光组件一周间隔设置的多个胶带段。
  17. 根据权利要求1所述的背光模组，其中，在所述遮光胶带的厚度基本上大于等于0.05mm的情况下，所述遮光胶带在第一贴附部、第二贴附部以及第三贴附部的交界位置处具有压痕。
  18. 一种显示装置，包括如权利要求1-17任一项所述的背光模组。
PCT/CN2017/115287 2017-05-05 2017-12-08 一种背光模组及显示装置 WO2018201719A1 (zh)

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