WO2019214633A1 - 扩散片、背光模组、液晶显示面板及显示装置 - Google Patents

扩散片、背光模组、液晶显示面板及显示装置 Download PDF

Info

Publication number
WO2019214633A1
WO2019214633A1 PCT/CN2019/085929 CN2019085929W WO2019214633A1 WO 2019214633 A1 WO2019214633 A1 WO 2019214633A1 CN 2019085929 W CN2019085929 W CN 2019085929W WO 2019214633 A1 WO2019214633 A1 WO 2019214633A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
light
printed layer
black
substrate layer
Prior art date
Application number
PCT/CN2019/085929
Other languages
English (en)
French (fr)
Inventor
王凯文
辛武根
董慧
桑艾霞
许海峰
Original Assignee
京东方科技集团股份有限公司
合肥鑫晟光电科技有限公司
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, 合肥鑫晟光电科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US16/642,776 priority Critical patent/US11061277B2/en
Publication of WO2019214633A1 publication Critical patent/WO2019214633A1/zh

Links

Images

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
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • 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
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • F21V5/00—Refractors for light sources
    • F21V5/08—Refractors for light sources producing an asymmetric light distribution
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/02—Diffusing elements; Afocal elements
    • 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
    • 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
    • G02F1/133388—Constructional arrangements; Manufacturing methods with constructional differences between the display region and the peripheral region
    • 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
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side

Definitions

  • the present disclosure relates to the field of display, and in particular, to a diffusion sheet, a backlight module, a liquid crystal display panel, and a display device.
  • a liquid crystal display is composed of a backlight module and a liquid crystal panel.
  • the liquid crystal panel itself does not have a light emitting characteristic.
  • the backlight module is an optical device, and the function thereof is to provide a planar light source with sufficient brightness and uniform distribution to the liquid crystal panel. .
  • the backlight module currently includes both direct type and side entry type. Since the Light-Emitting Diode (LED) component itself is a point light source, the direct-lit backlight module is prone to unevenness, color spots, or uneven brightness and darkness on the display screen and increases the total thickness of the module.
  • LED Light-Emitting Diode
  • the current application is more of a side-in type backlight module, and the backlight source is light from the side, that is, the LED elements are disposed on the side of the display area.
  • the side-entry backlight module mainly comprises a light source, a light guide plate, a reflection sheet, a diffusion sheet and a prism sheet, and the point light source emitted by the LED is converted into a line light source into the light guide plate by using the microstructure of the side of the light guide plate.
  • the line light source transmitted inside the light guide plate converts the horizontal line light source into a vertical direction surface light source to emit the surface of the light guide plate through the reflection sheet at the bottom of the light guide plate, and then uniformly diffuses, atomizes, and ⁇ the surface light source through the diffusion sheet.
  • a stable light source is formed for use.
  • a black printed layer on the backlight side causes a film black shadow, which in turn affects the display quality, and thus there is room for improvement.
  • a diffusion sheet provided by an embodiment of the present disclosure includes a substrate layer, a white printed layer, and a black printed layer; the substrate layer includes an edge region and a light transmissive region; the white printed layer and the black printed layer Located in the edge region, and in a direction in which the light incident surface of the substrate layer is directed to the light exiting surface, the black printed layer and the white printed layer are sequentially arranged.
  • the orthographic projection of the black printed layer on the substrate layer falls within the orthographic projection of the white printed layer within the substrate layer.
  • the black printed layer is located on a side of the light incident surface of the substrate layer, and the white printed layer is located on the black printed layer. Between the light-incident surface of the substrate layer; or the white printed layer is located on the light-emitting surface side of the substrate layer, and the black printed layer is located on the white printed layer and the substrate layer Between the light-emitting surfaces; or, the white printed layer is located on the light-emitting surface side of the base material layer, and the black printed layer is located on the light-incident surface side of the base material layer.
  • the width of the orthographic projection of the white printed layer on the substrate layer in the direction of the edge region pointing to the light transmitting region a width greater than an orthographic projection of the black printed layer on the substrate layer, and a side of the white printed layer away from the light transmissive region, a side of the black printed layer away from the light transmissive region, and the base
  • the sides of the layer are flush.
  • the width of the orthographic projection of the black printed layer on the substrate layer is greater than or equal to 1.6 mm and less than or equal to 2 mm, and The width of the orthographic projection of the white printed layer on the substrate layer is greater than or equal to 1.8 mm and less than or equal to 2.2 mm.
  • the material of the black printed layer and the white printed layer is trimethylcyclohexenone.
  • the embodiment of the present disclosure further provides a backlight module, including a backlight and a light guide plate, the backlight is located at a side of the light guide plate, and further includes a side of the light-emitting surface of the light guide plate as described above. a diffusion sheet, and an edge region of the substrate layer is adjacent to the backlight.
  • the backlight module provided in the embodiment of the present disclosure further includes a prism sheet located on a side of the diffusion sheet away from the light-emitting surface of the light guide plate, the prism sheet including the a first surface and a second surface parallel to the light-emitting surface of the light guide plate and a side surface connecting the first surface and the second surface, the first surface and the second surface being a plane, the side surface being a slope, the slope An angle between the edge area and the horizontal plane pointing to the backlight direction is an acute angle; and an orthographic projection of the side of the white printed layer adjacent to the light-transmitting area on the substrate layer falls on the slope Within the orthographic projection of the substrate layer.
  • the acute angle is greater than or equal to 75°.
  • embodiments of the present disclosure also provide a liquid crystal display panel including the backlight module as described above.
  • an embodiment of the present disclosure further provides a display device including the above-described liquid crystal display panel provided by an embodiment of the present disclosure.
  • FIG. 1 is a schematic structural view of a diffusion sheet according to an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a diffusion sheet according to an embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of a diffusion sheet according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a backlight module according to an embodiment of the present disclosure.
  • FIG. 7 is a partial structural diagram of a backlight module according to an embodiment of the present disclosure.
  • FIG. 8 is a partial structural diagram of a backlight module according to an embodiment of the present disclosure.
  • the liquid crystal display product has developed from a three-sided borderless liquid crystal display to a four-sided borderless liquid crystal display.
  • the border of the plastic frame is narrowed due to the four-sided borderless liquid.
  • the backlight side diffusion film will With a black printed layer, the borderless side frame of the four-sided borderless liquid crystal display is narrower than the three-sided borderless liquid crystal display, and is usually only 0.5 to 2 mm wider than the black printed layer.
  • the black printed layer on the backlight side is reflected by the prism sheet to produce a black shadow of the film. The presence of the black shadow increases the width of the black printed layer.
  • the black printed layer absorbs the light emitted from the bottom side light guide plate, the light intensity in the vicinity of the black printed layer is relatively weak due to the light absorbing effect of the black printed layer, and the vicinity of the black printed layer is dark relative to the light transmitting area, which is seen by the human eye.
  • the dark band is formed up, and the dark band further widens the width of the black printed layer, thereby affecting the quality of the display.
  • embodiments of the present disclosure provide a diffusion sheet, a backlight module, a liquid crystal display panel, and a display device for solving the problem of black shadow appearing on a display screen due to the setting of a black-edged printed layer in the prior art.
  • a diffusion sheet 100 provided by an embodiment of the present disclosure includes a substrate layer 1, a white printed layer 2, and a black printed layer 3.
  • the substrate layer 1 includes an edge region AA and a light transmitting region BB.
  • the white printed layer 2 and the black printed layer 3 are located in the edge area AA.
  • the black printed layer 2 and the white printed layer 3 are sequentially arranged in the direction in which the light incident surface 11 of the base material layer 1 is directed to the light exit surface 12.
  • the orthographic projection of the black printed layer 2 on the substrate layer 1 falls within the orthographic projection of the white printed layer 3 within the substrate layer 1.
  • the diffusing sheet provided by the embodiment of the present disclosure prevents the light entering the light side from entering the visible area of the display panel by providing a black printed layer in the edge region of the diffusing sheet, thereby effectively preventing light leakage; the prism sheet is further disposed in the backlight module.
  • the present disclosure further provides a white printed layer on the edge of the diffusion sheet. And the orthographic projection of the black printed layer on the substrate layer falls within the orthographic projection of the white printed layer on the substrate layer, so that the white printed layer can block the black shadow formed by the black printed layer reflecting on the prism sheet, thereby improving the display screen. Quality.
  • the substrate layer in the embodiment of the present disclosure is a transparent substrate layer.
  • the black printed layer 2 is located on the light incident surface 11 side of the substrate layer 1
  • the white printed layer 3 is located on the black printed layer 2 and the light incident surface 11 of the substrate layer 1. between.
  • the white printed layer 3 is located on the light-emitting surface 12 side of the substrate layer 1, and the black printed layer 2 is located between the white printed layer 3 and the light-emitting surface 12 of the substrate layer 1. .
  • the white printed layer 3 is located on the light-emitting surface 12 side of the substrate layer 1
  • the black printed layer 2 is located on the light-incident surface 11 side of the substrate layer 1.
  • the black printed layer 2 is used for absorbing the light from the backlight of the backlight module and directly entering the diffuser without passing through the light guide plate, thereby effectively preventing light leakage.
  • the orthographic projection of the black printed layer 2 on the substrate layer 1 falls within the orthographic projection of the white printed layer 3 within the substrate layer 1.
  • the white printed layer 3 can block the black shadow formed by the black printed layer 2 being reflected on the prism sheet of the backlight module, thereby improving the quality of the display screen.
  • the width of the orthographic projection of the white printed layer 3 on the substrate layer 1 is greater than that of the black printed layer 2 on the substrate.
  • the width of the orthographic projection of the layer 1 and the side surface 31 of the white printed layer 3 away from the light-transmitting region BB and the side surface 21 of the black printed layer 2 away from the light-transmitting region BB are flush with the side surface 13 of the substrate layer 1.
  • the black printed layer can effectively prevent light leakage when the width of the orthographic projection of the substrate layer is greater than or equal to 1.6 mm and less than or equal to 2 mm.
  • the width of the layer is about 0.2 mm wider than the width of the black printed layer, the black shadow can be effectively blocked, so that the width of the orthographic projection of the white printed layer on the substrate layer is greater than or equal to 1.8 mm and less than or equal to 2.2 mm.
  • the materials of the black printed layer and the white printed layer are all trimethylcyclohexenone.
  • the ink particles of the white printed layer need to be fine and uniform, and the color is pure white; the black printed layer can be used to block the light leakage effect like the ordinary ink.
  • the embodiment of the present disclosure further provides a backlight module 200, as shown in FIGS. 4-6, including a backlight 4 and a light guide plate 5.
  • the backlight 4 is located on the side 51 of the light guide plate 5.
  • the backlight module 200 further includes a diffusion sheet provided on the light-emitting surface 52 side of the light guide plate 5 including the above embodiment, and an edge region of the substrate layer 1 is adjacent to the backlight 4 .
  • the prism sheet 6 on the side of the light-emitting surface 52 of the diffusion sheet away from the light guide plate 5 is further included.
  • the prism sheet 6 includes a first surface 61 and a second surface 62 that are parallel to the light exit surface 52 of the light guide plate 5, and side surfaces 63 that connect the first surface 61 and the second surface 62.
  • the first surface 61 and the second surface 62 are planar, and the side surface 63 is a bevel (relative to the first surface or the second surface).
  • the angle between the side surface 63 and the horizontal plane of the edge region AA pointing in the direction of the backlight 4 is an acute angle ⁇ . .
  • the light emitted from the light guide plate 5 enters the prism sheet 6 at a side angle of 90 from the white printed layer 3 near the light-transmitting region BB.
  • the light emitted from the light guide plate 5 enters the prism sheet 6 from the side of the white printed layer 3 close to the light-transmitting region BB by more than 90 (i.e., obtuse angle) (as indicated by a broken line arrow in Fig. 8).
  • the reflected light is reflected toward the edge area AA (indicated by arrow 01), and a black shadow is formed in the edge area AA, and no black shadow is formed in the light-transmitting area BB, so that the problem of the black shadow is fundamentally solved.
  • the orthographic projection of the side of the white printed layer 3 near the light-transmitting region BB on the substrate layer 1 falls on the side surface 63 within the orthographic projection of the substrate layer 1 Can better solve the shadow problem.
  • FIG. 7-8 only shows a partial structural diagram of the backlight module, and the structure of other film layers is shown in FIG. 4-6.
  • the acute angle ⁇ is greater than or equal to 75°.
  • FIG. 4-6 in the embodiment of the present disclosure is merely a schematic structural view for clearly showing the structure of each component, and is not an actual size scaling diagram.
  • the light-incident surface 11 and/or the light-emitting surface 12 of the substrate layer 1 are screen-printed with a black printed layer 2 and/or a white printed layer 3, as shown in FIG. 4, the light-incident surface 11 of the substrate layer 1 is screen-printed.
  • the light-emitting surface 52 of the light guide plate 5 is in close contact with the light-incident surface 11 of the base material layer 1.
  • FIG. 1 the light-incident surface 11 and/or the light-emitting surface 12 of the substrate layer 1 are screen-printed with a black printed layer 2 and/or a white printed layer 3, as shown in FIG.
  • the light-emitting surface 12 of the base material layer 1 is silk-screened with a black printed layer 2 and a white printed layer 3, and the first surface 61 of the prism sheet 6 is in close contact with the light-emitting surface 12 of the base material layer 1.
  • the light-incident surface 11 of the substrate layer 1 is silk-screened with a black printed layer 2
  • the light-emitting surface 12 of the substrate layer 1 is screen-printed with a white printed layer 3
  • the light-emitting surface 52 of the light-guide plate 5 and the substrate layer 1 are The light incident surface 11 is in close contact with each other
  • the first surface 61 of the prism sheet 6 is in close contact with the light exit surface 12 of the base material layer 1.
  • the thickness of the black printed layer 2 and the white printed layer 3 is negligible, and between the light guide plate 5 and the substrate layer 1, between the prism sheet 6 and the substrate layer, the black printed layer 2 and the white printed layer 3 are not screen printed. And such a large gap appears as shown in Figure 4-6.
  • an embodiment of the present disclosure further provides a liquid crystal display panel, including the backlight module provided by the embodiment of the present disclosure.
  • the backlight module further includes a structure such as a reflection sheet, a front frame, and a back plate on the opposite side of the light-emitting surface of the light guide plate.
  • a structure such as a reflection sheet, a front frame, and a back plate on the opposite side of the light-emitting surface of the light guide plate.
  • an embodiment of the present disclosure further provides a display device, including the above liquid crystal display panel provided by an embodiment of the present disclosure.
  • the display device can be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • the display device refer to the embodiments of the diffusion sheet and the backlight module described above, and the repeated description is omitted.
  • the diffusion sheet, the backlight module, the liquid crystal display panel and the display device provided by the embodiments of the present disclosure prevent the high-intensity light entering the light-side side from entering the visible area of the display panel by providing a black printed layer in the edge region of the diffusion sheet, thereby effectively Preventing light leakage; since a prism sheet is further provided in the backlight module, in order to prevent the black printed layer from being reflected on the prism sheet to form a black shadow, the presence of the black shadow widens the width of the black printed layer, affecting the quality of the display screen, and the present disclosure Further, by providing a white printed layer on the edge of the diffusion sheet, and the orthographic projection of the black printed layer on the substrate layer falls within the orthographic projection of the white printed layer in the substrate layer, such that the white printed layer can block the black printed layer on the prism sheet A black shadow formed by reflection is generated to improve the quality of the display screen.

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)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

一种扩散片、背光模组、液晶显示面板及显示装置。扩散片（100）包括基材层（1）、白色印刷层（3）和黑色印刷层（2）。基材层（1）包括边缘区域（AA）和透光区域（BB）。白色印刷层（3）和黑色印刷层（2）位于边缘区域（AA），且在基材层（1）的入光面（11）指向出光面（12）的方向，黑色印刷层（2）和白色印刷层（3）依次排列。黑色印刷层（2）在基材层（1）的正投影落在白色印刷层（3）在基材层（1）的正投影之内。这样白色印刷层（3）可以遮挡黑色印刷层（2）在棱镜片（6）上发生反射而形成的黑影，从而提高显示画面的品质。

Description

扩散片、背光模组、液晶显示面板及显示装置
相关申请的交叉引用
本申请主张于2018年5月10日提交的中国专利申请No.201820698369.8的优先权，其全部内容通过引用结合于此。
技术领域
本公开涉及显示领域，尤其涉及一种扩散片、背光模组、液晶显示面板及显示装置。
背景技术
液晶显示器(Liquid Crystal Display，LCD)由背光模组及液晶面板组成，液晶面板本身不具备发光特性，背光模组是一种光学装置，其功能在于向液晶面板提供亮度充分并且分布均匀的平面光源。背光模组目前包括直下式和侧入式两种。由于发光二极管(Light-Emitting Diode，LED)元件本身为点光源，直下式背光模组容易在显示画面上产生亮斑、色斑或亮暗区域不均等现象而且会增加模块总厚度。因此为了解决该问题，目前应用较多的是侧入式背光模组，背光源是从侧边入光的，即将LED元件设置相对显示区域的侧边上。侧入式背光模组主要包括光源、导光板、反射片、扩散片和棱镜片，利用导光板侧边的微结构将LED所发出的点光源转换成线光源进入导光板内部。导光板内部传递的线光源经由导光板底部的反射片将水平方向的线光源转换成垂直方向的面光源射出导光板上表面，然后经过扩散片将面光源做均匀的扩散、雾化和瑕疵处理，形成稳定的光源加以利用。
在无边框液晶显示器中，背光源侧的黑色印刷层会产生膜片黑影，进而影响显示质量，并因此存在改进的空间。
发明内容
因此，本公开实施例提供的一种扩散片，包括基材层、白色印刷层和黑色印刷层；所述基材层包括边缘区域和透光区域；所述白色印刷层和所述黑色印刷层位于所述边缘区域，且在所述基材层的入光面指向出光面的方向，所述黑色印刷层和所述白色印刷层依次排列。所 述黑色印刷层在所述基材层的正投影落在所述白色印刷层在所述基材层的正投影之内。
在一个或多个实施例中，在本公开实施例提供的上述扩散片中，所述黑色印刷层位于所述基材层的入光面一侧，所述白色印刷层位于所述黑色印刷层与所述基材层的入光面之间；或，所述白色印刷层位于所述基材层的出光面一侧，所述黑色印刷层位于所述白色印刷层与所述基材层的出光面之间；或，所述白色印刷层位于所述基材层的出光面一侧，所述黑色印刷层位于所述基材层的入光面一侧。
在一个或多个实施例中，在本公开实施例提供的上述扩散片中，在所述边缘区域指向所述透光区域方向，所述白色印刷层在所述基材层的正投影的宽度大于所述黑色印刷层在所述基材层的正投影的宽度，且所述白色印刷层远离所述透光区域的侧面、所述黑色印刷层远离所述透光区域的侧面与所述基材层的侧面齐平设置。
在一个或多个实施例中，在本公开实施例提供的上述扩散片中，所述黑色印刷层在所述基材层的正投影的宽度大于或等于1.6mm且小于或等于2mm，并且所述白色印刷层在所述基材层的正投影的宽度大于或等于1.8mm且小于或等于2.2mm。
在一个或多个实施例中，在本公开实施例提供的上述扩散片中，所述黑色印刷层和所述白色印刷层的材料均为三甲基环己烯酮。
相应地，本公开实施例还提供了一种背光模组，包括背光源和导光板，所述背光源位于所述导光板的侧面，还包括位于所述导光板出光面一侧的如上所述的扩散片，且所述基材层的边缘区域靠近所述背光源。
在一个或多个实施例中，在本公开实施例提供的上述背光模组中，还包括位于所述扩散片远离所述导光板出光面一侧的棱镜片，所述棱镜片包括与所述导光板出光面平行的第一表面与第二表面以及连接所述第一表面与所述第二表面的侧面，所述第一表面和第二表面为平面，所述侧面为斜面，所述斜面与所述边缘区域指向所述背光源方向的水平面的夹角为锐角；且所述白色印刷层中靠近所述透光区域的侧边在所述基材层的正投影落在所述斜面在所述基材层的正投影之内。
在一个或多个实施例中，在本公开实施例提供的上述背光模组中，所述锐角大于或等于75°。
相应地，本公开实施例还提供了一种液晶显示面板，包括如如上所述的背光模组。
相应地，本公开实施例还提供了一种显示装置，包括如本公开实施例提供的上述所述的液晶显示面板。
附图说明
图1为本公开实施例提供的扩散片的结构示意图；
图2为本公开实施例提供的扩散片的结构示意图；
图3为本公开实施例提供的扩散片的结构示意图；
图4为本公开实施例提供的背光模组的结构示意图；
图5为本公开实施例提供的背光模组的结构示意图；
图6为本公开实施例提供的背光模组的结构示意图；
图7为本公开实施例提供的背光模组的部分结构示意图；以及
图8为本公开实施例提供的背光模组的部分结构示意图。
具体实施方式
下面结合附图，对本公开实施例提供的扩散片、背光模组、液晶显示面板及显示装置的具体实施方式进行详细地说明。
附图中各结构的大小和形状不反映上述扩散片和背光模组的真实比例，目的只是示意说明本公开内容。
液晶显示产品为了外观和显示画面最大化，从三边无边框液晶显示器发展为四边无边框液晶显示器，由于四边无边框液导致胶框边框变窄，为了防止爆灯漏光，背光源侧扩散片都会设有黑色印刷层，相比于三边无边框液晶显示器，四边无边框液晶显示器的背光源侧胶框更窄，通常只比黑色印刷层宽0.5至2mm。一方面，背光源侧的黑色印刷层经棱镜片反射会产生膜片黑影，黑影的存在使得黑色印刷层宽度增加，此部分黑影在大视角下清晰可见，严重影响到入光侧画面品质。另一方面，由于黑色印刷层吸收其底侧导光板出射的光，由于黑色印刷层的吸光作用，其附近的光强相对较弱，相对于透光区域，黑色印刷层附近较暗，人眼看上去形成暗带，该暗带进一步加宽了黑色印刷层的宽度，从而影响显示画面的品质。
有鉴于此，本公开实施例提供一种扩散片、背光模组、液晶显示 面板及显示装置，用以解决已知技术中由于黑边印刷层的设置而导致显示画面出现黑影的问题。
本公开实施例提供的一种扩散片100，如图1-3所示，包括基材层1、白色印刷层2和黑色印刷层3。基材层1包括边缘区域AA和透光区域BB。白色印刷层2和黑色印刷层3位于边缘区域AA。在基材层1的入光面11指向出光面12的方向，黑色印刷层2和白色印刷层3依次排列。
黑色印刷层2在基材层1的正投影落在白色印刷层3在基材层1的正投影之内。
本公开实施例提供的扩散片，通过在扩散片的边缘区域设置黑色印刷层来防止入光侧高强度的光进入显示面板的可视区，从而有效防止漏光；背光模组中还设置棱镜片，为了防止黑色印刷层在棱镜片上发生反射而形成黑影，由于黑影的存在加宽了黑色印刷层的宽度，影响显示画面的品质，本公开进一步通过在扩散片的边缘设置白色印刷层，且黑色印刷层在基材层的正投影落在白色印刷层在基材层的正投影之内，这样白色印刷层可以遮挡黑色印刷层在棱镜片上发生反射而形成的黑影，从而提高显示画面的品质。
具体实施时，本公开实施例中的基材层为透明基材层。
在一示例性实施例中，如图1所示，黑色印刷层2位于基材层1的入光面11一侧，白色印刷层3位于黑色印刷层2与基材层1的入光面11之间。
在一示例性实施例中，如图2所示，白色印刷层3位于基材层1的出光面12一侧，黑色印刷层2位于白色印刷层3与基材层1的出光面12之间。
在一示例性实施例中，如图3所示，白色印刷层3位于基材层1的出光面12一侧，黑色印刷层2位于基材层1的入光面11一侧。
黑色印刷层2用来吸收背光模组的背光源发出的没有经过导光板而直接进入扩散片的光线，有效防止漏光。黑色印刷层2在基材层1的正投影落在白色印刷层3在基材层1的正投影之内。这样白色印刷层3可以遮挡黑色印刷层2在背光模组的棱镜片上发生反射而形成的黑影，从而提高显示画面的品质。
进一步地，在具体实施时，为了有效防止背光源产生的光线未经 导光板而直接进入扩散片靠近背光源的边缘射出，以及有效遮挡黑色印刷层2在棱镜片上反射产生的黑影，在本公开实施例提供的扩散片中，如图1-3所示，在边缘区域AA指向透光区域BB方向，白色印刷层3在基材层1的正投影的宽度大于黑色印刷层2在基材层1的正投影的宽度，且白色印刷层3远离透光区域BB的侧面31、黑色印刷层2远离透光区域BB的侧面21与基材层1的侧面13齐平设置。
进一步地，在具体实施时，在本公开实施例提供的扩散片中，黑色印刷层在基材层的正投影的宽度大于或等于1.6mm且小于或等于2mm时就可以有效防止漏光，白色印刷层的宽度比黑色印刷层的宽度宽约0.2mm时就可以有效遮挡黑影，因此白色印刷层在基材层的正投影的宽度大于或等于1.8mm且小于或等于2.2mm。
进一步地，在具体实施时，在本公开实施例提供的扩散片中，黑色印刷层和白色印刷层的材料均为三甲基环己烯酮。为了起到很好的遮挡黑影的效果，白色印刷层的油墨颗粒需细小均匀，颜色纯白；黑色印刷层同普通油墨一样，能起到遮挡漏光的效果即可。
基于同一发明构思，本公开实施例还提供了一种背光模组200，如图4-6所示，包括背光源4和导光板5。背光源4位于导光板5的侧面51。背光模组200还包括位于导光板5的出光面52一侧的包括上述实施例提供的扩散片，且基材层1的边缘区域靠近背光源4。
进一步地，在具体实施时，在本公开实施例提供的背光模组中，如图4-6所示，还包括位于扩散片远离导光板5的出光面52一侧的棱镜片6。棱镜片6包括与导光板5的出光面52平行的第一表面61与第二表面62，以及连接第一表面61与第二表面62的侧面63。第一表面61和第二表面62为平面，并且侧面63为斜面(相对于第一表面或第二表面而言)。为了使导光板5出射的光以大于或等于90°从白色印刷层3靠近透光区BB的侧边进入棱镜片，侧面63与边缘区域AA指向背光源4方向的水平面的夹角为锐角α。
如图7所示，导光板5出射的光以90°从白色印刷层3靠近透光区BB的侧边进入棱镜片6。这样可以使从白色印刷层3靠近透光区BB的侧边进入棱镜片的光线无反射光，而是直接进入棱镜片6(如图7中虚线箭头所示)。因此从白色印刷层3靠近透光区BB的侧边进入棱镜片的光线在棱镜片上不会反射形成黑影，从而提高显示画面的品质。
如图8所示，导光板5出射的光以大于90°(即，钝角)从白色印刷层3靠近透光区BB的侧边进入棱镜片6(如图8中虚线箭头所示)。此时反射光向边缘区域AA反射(箭头01所示)，在边缘区域AA形成黑影，在透光区域BB不会形成黑影，因此从根本上解决了黑影的问题。
由于白色印刷层3是为了遮挡黑影，因此通过使白色印刷层3中靠近透光区域BB的侧边在基材层1的正投影落在侧面63在基材层1的正投影之内，可以更好地解决黑影问题。
需要说明的是，图7-8仅示意出了背光模组的部分结构示意图，其它膜层的结构参见图4-6。
进一步地，在具体实施时，为了使导光板5出射的光以大于或等于90°从白色印刷层3靠近透光区BB的侧边进入棱镜片，在本公开实施例提供的背光模组中，如图4-6所示，锐角α大于或等于75°。这样从白色印刷层3靠近透光区BB的侧边进入棱镜片的光线不会在黑色印刷层2靠近透光区域BB的位置产生反射黑影，从根本上解决了黑影的问题。
需要说明的是，本公开实施例中图4-6给出的仅仅是结构示意图，是为了清楚地显示各个部件结构，并不是实际的尺寸比例缩放图。图4-6中基材层1的入光面11和/或出光面12丝印有黑色印刷层2和/或白色印刷层3，如图4所示，基材层1的入光面11丝印有黑色印刷层2和白色印刷层3，导光板5的出光面52与基材层1的入光面11紧贴。如图5所示，基材层1的出光面12丝印有黑色印刷层2和白色印刷层3，棱镜片6的第一表面61与基材层1的出光面12紧贴。如图6所示，基材层1的入光面11丝印有黑色印刷层2，基材层1的出光面12丝印有白色印刷层3，导光板5的出光面52与基材层1的入光面11紧贴，棱镜片6的第一表面61与基材层1的出光面12紧贴。黑色印刷层2和白色印刷层3的厚度可以忽略不计，导光板5和基材层1之间、棱镜片6与基材层之间并不会因为丝印了黑色印刷层2和白色印刷层3而出现如图4-6中所示的如此大的缝隙。
基于同一发明构思，本公开实施例还提供了一种液晶显示面板，包括本公开实施例提供的上述背光模组。
在具体实施时，在本公开实施例提供的背光模组中，背光模组还 包括位于导光板出光面的相对面一侧的反射片、前框和背板等结构，这些结构与已知技术中的设置方式及功能均相同，在此不做详述。
基于同一发明构思，本公开实施例还提供了一种显示装置，包括本公开实施例提供的上述液晶显示面板。该显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。该显示装置的实施可以参见上述扩散片、背光模组的实施例，重复之处不再赘述。
本公开实施例提供的扩散片、背光模组、液晶显示面板及显示装置，通过在扩散片的边缘区域设置黑色印刷层来防止入光侧高强度的光进入显示面板的可视区，从而有效防止漏光；由于背光模组中还设置棱镜片，为了防止黑色印刷层在棱镜片上发生反射而形成黑影，由于黑影的存在加宽了黑色印刷层的宽度，影响显示画面的品质，本公开进一步通过在扩散片的边缘设置白色印刷层，且黑色印刷层在基材层的正投影落在白色印刷层在基材层的正投影之内，这样白色印刷层可以遮挡黑色印刷层在棱镜片上发生反射而形成的黑影，从而提高显示画面的品质。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (12)

  1. 一种扩散片，包括基材层、白色印刷层和黑色印刷层；
    其中所述基材层包括边缘区域和透光区域；
    其中所述白色印刷层和所述黑色印刷层位于所述边缘区域，且在所述基材层的入光面指向出光面的方向，所述黑色印刷层和所述白色印刷层依次排列；以及
    其中所述黑色印刷层在所述基材层的正投影落在所述白色印刷层在所述基材层的正投影之内。
  2. 如权利要求1所述的扩散片，其中所述黑色印刷层位于所述基材层的入光面一侧，所述白色印刷层位于所述黑色印刷层与所述基材层的入光面之间。
  3. 如权利要求1所述的扩散片，其中所述白色印刷层位于所述基材层的出光面一侧，所述黑色印刷层位于所述白色印刷层与所述基材层的出光面之间。
  4. 如权利要求1所述的扩散片，其中所述白色印刷层位于所述基材层的出光面一侧，所述黑色印刷层位于所述基材层的入光面一侧。
  5. 如权利要求1所述的扩散片，其中在所述边缘区域指向所述透光区域方向，所述白色印刷层在所述基材层的正投影的宽度大于所述黑色印刷层在所述基材层的正投影的宽度，且所述白色印刷层远离所述透光区域的侧面、所述黑色印刷层远离所述透光区域的侧面与所述基材层的侧面齐平设置。
  6. 如权利要求5所述的扩散片，其中所述黑色印刷层在所述基材层的正投影的宽度大于或等于1.6mm且小于或等于2mm，并且所述白色印刷层在所述基材层的正投影的宽度大于或等于1.8mm且小于或等于2.2mm。
  7. 如权利要求1所述的扩散片，其中所述黑色印刷层和所述白色印刷层的材料均为三甲基环己烯酮。
  8. 一种背光模组，包括背光源和导光板，所述背光源位于所述导光板的侧面，还包括位于所述导光板出光面一侧的如权利要求1-7任一项所述的扩散片，且所述基材层的边缘区域靠近所述背光源。
  9. 如权利要求8所述的背光模组，还包括位于所述扩散片远离所 述导光板出光面一侧的棱镜片，所述棱镜片包括与所述导光板出光面平行的第一表面与第二表面以及连接所述第一表面与所述第二表面的侧面，所述第一表面和第二表面为平面，所述侧面为斜面，所述斜面与所述边缘区域指向所述背光源方向的水平面的夹角为锐角；且所述白色印刷层中靠近所述透光区域的侧边在所述基材层的正投影落在所述斜面在所述基材层的正投影之内。
  10. 如权利要求9所述的背光模组，其中所述锐角大于或等于75°。
  11. 一种液晶显示面板，包括如权利要求8-10任一项所述的背光模组。
  12. 一种显示装置，包括如权利要求11所述的液晶显示面板。
PCT/CN2019/085929 2018-05-10 2019-05-08 扩散片、背光模组、液晶显示面板及显示装置 WO2019214633A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/642,776 US11061277B2 (en) 2018-05-10 2019-05-08 Diffusion sheet, backlight module, liquid crystal display panel, and display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201820698369.8U CN208060755U (zh) 2018-05-10 2018-05-10 一种扩散片、背光模组、液晶显示面板及显示装置
CN201820698369.8 2018-05-10

Publications (1)

Publication Number Publication Date
WO2019214633A1 true WO2019214633A1 (zh) 2019-11-14

Family

ID=63982255

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/085929 WO2019214633A1 (zh) 2018-05-10 2019-05-08 扩散片、背光模组、液晶显示面板及显示装置

Country Status (3)

Country Link
US (1) US11061277B2 (zh)
CN (1) CN208060755U (zh)
WO (1) WO2019214633A1 (zh)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110637243B (zh) * 2017-12-07 2020-12-18 京东方科技集团股份有限公司 显示面板、显示装置和制造显示面板的方法
CN208060755U (zh) 2018-05-10 2018-11-06 合肥鑫晟光电科技有限公司 一种扩散片、背光模组、液晶显示面板及显示装置
KR20200078874A (ko) 2018-12-24 2020-07-02 엘지디스플레이 주식회사 표시 장치
CN111708206B (zh) * 2020-07-17 2024-03-26 合肥鑫晟光电科技有限公司 一种触控显示模组及其制作方法、显示装置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6053619A (en) * 1997-07-08 2000-04-25 Sharp Kabushiki Kaisha Backlight device
US7342618B2 (en) * 1999-12-29 2008-03-11 Lg.Philips Lcd Co., Ltd. Backlight device comprising a printing portion made of colorless ink for preventing a bright line and liquid crystal display device having the same
CN101975371A (zh) * 2010-09-09 2011-02-16 友达光电股份有限公司 下扩散片、背光模块及显示器
US20110141397A1 (en) * 2009-12-16 2011-06-16 Samsung Mobile Display Co., Ltd. Backlight unit and liquid crystal display device having the same
CN102597603A (zh) * 2009-12-28 2012-07-18 夏普株式会社 面状照明装置和具备它的显示装置
TWI437279B (zh) * 2010-09-02 2014-05-11 Au Optronics Corp 下擴散片、背光模組及顯示器
CN205191366U (zh) * 2015-11-20 2016-04-27 东莞轩朗实业有限公司 侧入式显示模组
CN205844693U (zh) * 2016-06-29 2016-12-28 合肥惠科金扬科技有限公司 侧入式背光模组及液晶显示装置
CN208060755U (zh) * 2018-05-10 2018-11-06 合肥鑫晟光电科技有限公司 一种扩散片、背光模组、液晶显示面板及显示装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5022312B2 (ja) * 2008-06-18 2012-09-12 株式会社ジャパンディスプレイイースト 液晶表示装置の製造方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6053619A (en) * 1997-07-08 2000-04-25 Sharp Kabushiki Kaisha Backlight device
US7342618B2 (en) * 1999-12-29 2008-03-11 Lg.Philips Lcd Co., Ltd. Backlight device comprising a printing portion made of colorless ink for preventing a bright line and liquid crystal display device having the same
US20110141397A1 (en) * 2009-12-16 2011-06-16 Samsung Mobile Display Co., Ltd. Backlight unit and liquid crystal display device having the same
CN102597603A (zh) * 2009-12-28 2012-07-18 夏普株式会社 面状照明装置和具备它的显示装置
TWI437279B (zh) * 2010-09-02 2014-05-11 Au Optronics Corp 下擴散片、背光模組及顯示器
CN101975371A (zh) * 2010-09-09 2011-02-16 友达光电股份有限公司 下扩散片、背光模块及显示器
CN205191366U (zh) * 2015-11-20 2016-04-27 东莞轩朗实业有限公司 侧入式显示模组
CN205844693U (zh) * 2016-06-29 2016-12-28 合肥惠科金扬科技有限公司 侧入式背光模组及液晶显示装置
CN208060755U (zh) * 2018-05-10 2018-11-06 合肥鑫晟光电科技有限公司 一种扩散片、背光模组、液晶显示面板及显示装置

Also Published As

Publication number Publication date
US20210080787A1 (en) 2021-03-18
CN208060755U (zh) 2018-11-06
US11061277B2 (en) 2021-07-13

Similar Documents

Publication Publication Date Title
WO2019214633A1 (zh) 扩散片、背光模组、液晶显示面板及显示装置
US10782466B2 (en) Backlight module and display apparatus
KR20160022224A (ko) 도광판 및 이를 포함하는 백라이트 유닛
US20120086875A1 (en) Lighting device, display device and television receiver
JP2013218954A (ja) 発光装置、表示装置および照明装置
JP2002109935A (ja) 面光源装置
CN204213723U (zh) 一种背光模组及显示器
CN110441947A (zh) 一种显示装置
CN105807492A (zh) 背光模组和显示装置
WO2016183901A1 (zh) 导光板及背光模组
WO2016169173A1 (zh) 导光板、背光源和显示装置
WO2015136625A1 (ja) 光源装置、表示装置、及び光源装置の製造方法
CN115176197B (zh) 光学膜片、背光模组及显示装置
JP2003279979A (ja) 液晶表示装置
JP6990279B2 (ja) 光源装置、照明装置、及び表示装置
JP2024020648A (ja) 発光装置
KR100880217B1 (ko) 백라이트
KR101327852B1 (ko) 백라이트 유닛
WO2017088447A1 (zh) 一种直下式led背光模组及包含该背光模组的显示器
CN105431674B (zh) 光源装置和显示装置
KR20140141304A (ko) 라운드 다각패턴을 가진 도광판 및 이를 구비한 액정표시소자
US11194189B2 (en) Display apparatus
KR100720836B1 (ko) 발광 모듈
KR100892623B1 (ko) 평판 디스플레이용 백라이트 구조
KR20150072915A (ko) 광학 시트 및 이를 이용한 면광원장치

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19800603

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19800603

Country of ref document: EP

Kind code of ref document: A1

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 28.05.2021)

122 Ep: pct application non-entry in european phase

Ref document number: 19800603

Country of ref document: EP

Kind code of ref document: A1