WO2016173156A1 - 导光板、背光模块及液晶显示器 - Google Patents

导光板、背光模块及液晶显示器 Download PDF

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Publication number
WO2016173156A1
WO2016173156A1 PCT/CN2015/087630 CN2015087630W WO2016173156A1 WO 2016173156 A1 WO2016173156 A1 WO 2016173156A1 CN 2015087630 W CN2015087630 W CN 2015087630W WO 2016173156 A1 WO2016173156 A1 WO 2016173156A1
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WIPO (PCT)
Prior art keywords
guide plate
light guide
transparent
quantum dots
backlight module
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.)
Ceased
Application number
PCT/CN2015/087630
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English (en)
French (fr)
Inventor
周革革
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.)
Wuhan China Star Optoelectronics Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Technology Co Ltd
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Publication date
Application filed by Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Technology Co Ltd
Priority to US14/775,798 priority Critical patent/US10591775B2/en
Publication of WO2016173156A1 publication Critical patent/WO2016173156A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • 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
    • G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
    • 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
    • G02B6/0003—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 doped with fluorescent agents
    • 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
    • G02B6/0016—Grooves, prisms, gratings, scattering particles or rough 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
    • G02B6/0013—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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of 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
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from 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
    • G02B6/0046—Tapered light guide, e.g. wedge-shaped light guide
    • 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
    • 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 
    • G02F1/015—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 semiconductor elements having potential barriers, e.g. having a PN or PIN junction
    • G02F1/017—Structures with periodic or quasi periodic potential variation, e.g. superlattices, quantum wells
    • G02F1/01791—Quantum boxes or quantum dots
    • 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
    • G02F1/133553—Reflecting elements
    • 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
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Definitions

  • the invention belongs to the technical field of liquid crystal display, and in particular to a light guide plate, a backlight module and a liquid crystal display.
  • liquid crystal displays have been widely used as display components of electronic devices in various electronic products.
  • an existing liquid crystal display includes a liquid crystal panel that is oppositely disposed and a backlight module that provides a display backlight to the liquid crystal panel.
  • a backlight module which is one of the most important components in a liquid crystal display
  • the color gamut of the display backlight provided to the liquid crystal panel directly determines the color gamut of the liquid crystal display.
  • a diaphragm formed of quantum dots is usually used in the backlight module.
  • FIG. 1 is a partial side elevational view of a prior art backlight module having a quantum dot diaphragm.
  • the light guide plate 10 is disposed in the back frame 20 , and the quantum dot film 30 and the optical film 40 are sequentially disposed on the top surface of the light guide plate 10 , and surround the quantum dot film on the top surface of the light guide plate 10 .
  • a quantum dot film failure region 50 is formed, and the plastic frame 60 is disposed in the back frame 20 and surrounds the light guide plate 10.
  • the optical film 40 is fixed on the plastic frame 60 through the light-shielding double-sided adhesive 70, and the reflective sheet 80 is disposed on the light guide plate 10. Between the bottom surface and the back frame 20.
  • the quantum dot film 30 is used to increase the color gamut of the display backlight provided by the backlight module, but due to the quantum dot film failure region 50 surrounding the quantum dot film 30.
  • the area of the area is too large, which is not conducive to the narrow bezel design of the backlight module.
  • an object of the present invention is to provide a light guide plate, a backlight module, and a liquid crystal display that improve the color gamut of the display backlight while facilitating the design of the narrow bezel of the backlight module.
  • a light guide plate including a bottom surface and opposite to the bottom surface is provided a light-emitting surface, the light-emitting surface is recessed to form a groove, the groove is filled with a plurality of light-emitting quantum dots, and the light-emitting surface is covered with a closed film to enclose the plurality of light-emitting quantum dots in the groove in.
  • the light guide plate includes a flat body and a wedge body extending upward along one end of the flat body, a light emitting surface of the light guide plate includes a top surface of the flat body, and a bottom surface of the light guide plate includes the flat body The bottom surface and the bottom surface of the wedge body.
  • the groove is filled with a transparent glue, and the plurality of luminescent quantum dots are uniformly dispersed in the transparent glue.
  • the refractive index of the transparent adhesive is the same as the refractive index of the light guide plate.
  • the groove is further filled with a plurality of scattering particles, and the plurality of scattering particles are uniformly dispersed in the transparent glue together with the plurality of luminescent quantum dots.
  • the scattering particles are transparent particles, and the refractive index of the scattering particles is different from the refractive index of the transparent glue.
  • the transparent adhesive is a UV curable adhesive.
  • closure membrane is a transparent membrane.
  • a backlight module including the above-described light guide plate is provided.
  • a liquid crystal display including the above-described backlight module is provided.
  • the invention has the beneficial effects that the invention forms a groove on the top surface of the flat body of the light guide plate (ie, the light exit surface of the light guide plate), and fills the groove with a plurality of light-emitting quantum dots, and the light-emitting quantum dots can improve the color of the display backlight.
  • the domain, while surrounding the surrounding sidewalls forming the grooves, can be minimized, thereby making the narrow bezel design of the backlight module easy to implement.
  • FIG. 1 is a partial side view of a prior art backlight module having a quantum dot film
  • FIG. 2 is a side view of a liquid crystal display according to an embodiment of the present invention.
  • FIG. 3 is a partial side view of a backlight module in accordance with an embodiment of the present invention.
  • FIG. 4 is a perspective view of a light guide plate in accordance with an embodiment of the present invention.
  • FIG. 2 is a side view of a liquid crystal display according to an embodiment of the present invention.
  • a liquid crystal display includes a liquid crystal panel 100 and a backlight module 200 disposed opposite to each other, wherein the backlight module 200 provides a high color gamut display backlight to the liquid crystal panel 100 to cause the liquid crystal panel 100 to display an image.
  • the present invention is directed to the backlight module 200. Therefore, in order to avoid redundancy, the specific structure of the liquid crystal panel 100 will not be described in detail herein. Those skilled in the art can refer to the liquid crystal disclosed in the prior art. The structure of the panel.
  • the backlight module 200 according to an embodiment of the present invention will be described in detail below.
  • 3 is a partial side view of a backlight module in accordance with an embodiment of the present invention.
  • 4 is a perspective view of a light guide plate in accordance with an embodiment of the present invention.
  • the backlight module 200 includes a back frame 210, a light guide plate 220, a plurality of light-emitting quantum dots 231, a sealing film 240, a plurality of optical films 250, a plastic frame 260, and a light shielding. Double-sided tape 270 and reflective sheet 280.
  • the back frame 210 generally includes a bottom plate 211 and four side plates 212 respectively located on four sides of the bottom plate 211.
  • the light guide plate 220 is disposed on the bottom plate 211 of the back frame 210.
  • the light guide plate 220 includes a flat body 221 and a wedge body 222 extending upward along one end of the flat body 221 .
  • the thicker end surface of the wedge body 222 is generally a light incident end surface, and the thin end surface of the wedge body 222 is smoothly joined to one end of the flat body 221 .
  • the bottom surface of the light guide plate 220 includes a bottom surface of the wedge body 222 and a bottom surface of the flat plate body 221
  • the light exit surface of the light guide plate 220 includes a top surface of the flat plate body 221, and a bottom surface of the light guide plate 220 and the light guide plate.
  • the light-emitting surface of 220 is opposite.
  • a portion of the top surface of the flat body 221 is recessed to form a recess 2211.
  • a plurality of luminescent quantum dots 231 are filled in the recess 2211.
  • the sealing film 240 is covered on the top surface of the flat body 221 to enclose the luminescent quantum dots 231 in the recess 2211.
  • the closure membrane 240 is a transparent membrane.
  • the luminescent quantum dots 231 filled in the recesses 2211 formed on the top surface of the flat body 221 can improve the color gamut of the display backlight while simultaneously surrounding the quantum dot film 30 of the prior art shown in FIG.
  • the peripheral sidewalls surrounding the groove 2211 can be minimized, so that the narrow bezel design of the backlight module 100 can be easily realized.
  • a plurality of optical films 250 are sequentially disposed on the closure film 240.
  • these optical films 250 may include brightness enhancing films, diffusing films, etc., which are capable of improving the optical quality of the backlight of the light source exiting the closed film 240.
  • FIG. 3 two optical films are shown. 250, but the invention is not limited thereto.
  • the plastic frame 260 is disposed in the back frame 210 and surrounds the light guide plate 220.
  • the plurality of optical films 250 are fixed on the plastic frame 260 by the light-shielding double-sided tape 270, thereby also fixing the light guide plate 220 in the back frame 210.
  • the reflective sheet 280 is disposed between the light guide plate 220 and the bottom plate 211 of the back frame 210. The reflective sheet 280 can reflect the light reaching the light back to the light guide plate 220, thereby improving light utilization efficiency.
  • the transparent adhesive 290 is filled in the recess 2211, and a plurality of luminescent quantum dots 231 are uniformly dispersed in the transparent adhesive 290.
  • the transparent adhesive 290 is a UV-curable adhesive, but the present invention is not limited thereto.
  • the refractive index of the transparent adhesive 290 is the same as or the same as the refractive index of the light guide plate 220.
  • a plurality of scattering particles 232 are also filled in the recess 2211, and the scattering particles 232 and the plurality of luminescent quantum dots 231 are uniformly dispersed in the transparent adhesive 290. Further, the heat dissipating particles 232 are transparent particles having a refractive index different from or different from the refractive index of the transparent rubber.

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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)
  • Planar Illumination Modules (AREA)
  • Liquid Crystal (AREA)

Abstract

一种导光板（220），具有该导光板（220）的背光模块（200）以及具有该背光模块（200）的液晶显示器。该导光板（220）包括底面及与所述底面相对的出光面，所述出光面下凹形成一凹槽（2211），所述凹槽（2211）中填充若干发光量子点（231），所述出光面上覆盖封闭膜片（240），以将所述若干发光量子点（231）封闭于所述凹槽（2211）中。通过在导光板（220）的出光面上形成凹槽（2211），在凹槽（2211）中填充若干发光量子点（231），这些发光量子点（231）可提高显示背光的色域，同时围绕形成凹槽（2211）的四周侧壁能够最大程度地薄型化，从而使背光模块（200）的窄边框设计易于实现。

Description

导光板、背光模块及液晶显示器 技术领域
本发明属于液晶显示技术领域，具体地讲，涉及一种导光板、背光模块及液晶显示器。
背景技术
目前，液晶显示器作为电子设备的显示部件已经广泛的应用于各种电子产品中。随着消费者对电子设备显示的色彩鲜明度要求越来越高，需要提高作为电子设备中的显示部件的液晶显示器的色域。通常，现有的液晶显示器包括相对设置的液晶面板和向液晶面板提供显示背光的背光模块。作为液晶显示器中最重要的组成部件之一的背光模块，其向液晶面板提供的显示背光的色域直接决定了液晶显示器的色域。现有技术中，为了提高背光模块提供的显示背光的色域，通常在背光模块中运用由量子点形成的膜片。
图1是现有技术的一种具有量子点膜片的背光模块的局部侧视图。参照图1，导光板10设置于背框20之中，量子点膜片30和光学膜片40依次设置于导光板10的顶面上，在导光板10的顶面上且围绕量子点膜片30形成量子点膜片失效区50，胶框60设置于背框20中且围绕导光板10，光学膜片40通过遮光双面胶70固定在胶框60上，反射片80设置在导光板10的底面与背框20之间。然而，在图1所示的现有技术的背光模块中，利用量子点膜片30提高了背光模块提供的显示背光的色域，但是由于围绕量子点膜片30的量子点膜片失效区50的区域面积偏大，不利于实现背光模块的窄边框设计。
发明内容
为了解决上述现有技术存在的问题，本发明的目的在于提供一种提高显示背光的色域同时又利于实现背光模块的窄边框设计的导光板、背光模块及液晶显示器。
根据本发明的一方面，提供了一种导光板，其包括底面及与所述底面相对 的出光面，所述出光面下凹形成一凹槽，所述凹槽中填充若干发光量子点，所述出光面上覆盖封闭膜片，以将所述若干发光量子点封闭于所述凹槽中。
进一步地，所述导光板包括平板体及沿所述平板体一端向上延伸的楔形体，所述导光板的出光面包括所述平板体的顶面，所述导光板的底面包括所述平板体的底面及所述楔形体的底面。
进一步地，所述凹槽中填充透明胶，所述若干发光量子点均匀分散在所述透明胶中。
进一步地，所述透明胶的折射率与所述导光板的折射率相同。
进一步地，所述凹槽中还填充若干散射粒子，所述若干散射粒子与所述若干发光量子点共同均匀分散在所述透明胶中。
进一步地，所述散射粒子为透明颗粒，所述散射粒子的折射率与所述透明胶的折射率不相同。
进一步地，所述透明胶为紫外固化胶。
进一步地，所述封闭膜片为透明膜片。
根据本发明的另一方面，提供了一种背光模块，其包括上述的导光板。
根据本发明的又一方面，提供了一种液晶显示器，其包括上述的背光模块。
本发明的有益效果：本发明在导光板的平板体的顶面(即导光板的出光面)上形成凹槽，在凹槽中填充若干发光量子点，这些发光量子点可提高显示背光的色域，同时围绕形成凹槽的四周侧壁能够最大程度地薄型化，从而使背光模块的窄边框设计易于实现。
附图说明
通过结合附图进行的以下描述，本发明的实施例的上述和其它方面、特点和优点将变得更加清楚，附图中：
图1是现有技术的一种具有量子点膜片的背光模块的局部侧视图；
图2是根据本发明的实施例的液晶显示器的侧视图；
图3是根据本发明的实施例的背光模块的局部侧视图；
图4是根据本发明的实施例的导光板的立体示意图。
具体实施方式
以下，将参照附图来详细描述本发明的实施例。然而，可以以许多不同的形式来实施本发明，并且本发明不应该被解释为限制于这里阐述的具体实施例。相反，提供这些实施例是为了解释本发明的原理及其实际应用，从而使本领域的其他技术人员能够理解本发明的各种实施例和适合于特定预期应用的各种修改。在附图中，为了清楚器件，夸大了层和区域的厚度，相同的标号在整个说明书和附图中可用来表示相同的元件。
图2是根据本发明的实施例的液晶显示器的侧视图。
参照图2，根据本发明的实施例的液晶显示器包括相对设置的液晶面板100和背光模块200，其中，背光模块200提供高色域的显示背光给液晶面板100，以使该液晶面板100显示影像。在本实施例中，由于本发明的发明要点是针对背光模块200，所以为了避免赘述，液晶面板100的具体结构在此不再详细介绍，本领域的技术人员可参照现有技术中公开的液晶面板的结构。
以下将对根据本发明的实施例的背光模块200进行详细的描述。图3是根据本发明的实施例的背光模块的局部侧视图。图4是根据本发明的实施例的导光板的立体示意图。
一并参照图3和图4，根据本发明的实施例的背光模块200包括背框210、导光板220、若干发光量子点231、封闭膜片240、若干光学膜片250、胶框260、遮光双面胶270及反射片280。
具体而言，在图3中，仅示出了背框210包括的底板211及位于底板211一侧的侧板212。应当理解的是，背框210通常包括底板211及分别位于底板211四侧的四个侧板212。
导光板220设置于背框210的底板211之上。在本实施例中，如图4所示， 导光板220包括平板体221及沿该平板体221一端向上延伸的楔形体222。该楔形体222较厚的端面通常为入光端面，该楔形体222较薄的端面与平板体221的一端平滑衔接。
进一步地，在本实施例中，导光板220的底面包括楔形体222的底面以及平板体221的底面，而导光板220的出光面包括平板体221的顶面，导光板220的底面与导光板220的出光面相对。平板体221的顶面的部分下凹形成一凹槽2211。
若干发光量子点231填充在凹槽2211中。在平板体221的顶面上覆盖封闭膜片240，从而将这些发光量子点231封闭在凹槽2211中。在本实施例中，封闭膜片240为透明膜片。这样，在平板体221的顶面上形成的凹槽2211中填充的这些发光量子点231可提高显示背光的色域，同时与图1所示的现有技术中的围绕量子点膜片30的量子点膜片失效区50所占区域相比，围绕形成凹槽2211的四周侧壁能够最大程度地薄型化，从而使背光模块100的窄边框设计易于实现。
若干光学膜片250依次设置在封闭膜片240上。在本实施例中，这些光学膜片250可包括增亮膜、扩散膜等，它们能够改善由封闭膜片240出射的光源背光的光学品质，在图3中，示出了两张光学膜片250，但本发明并不以此为限。胶框260设置于背框210中且围绕导光板220，若干光学膜片250通过遮光双面胶270固定在胶框260上，从而也将导光板220固定在背框210中。反射片280设置于导光板220与背框210的底板211之间，该反射片280能够将到达其上的光线反射回导光板220中，从而提高光线利用率。
进一步地，在凹槽2211中填充透明胶290，若干发光量子点231均匀分散在透明胶290中。在本实施例中，优选地，透明胶290为紫外线固化胶，但本发明并不限制于此。此外，本实施例优选透明胶290的折射率与导光板220的折射率相同或一致。
为了使光源背光能够均匀扩散出射，在凹槽2211中还填充若干散射粒子232，这些散射粒子232和若干发光量子点231共同均匀分散在透明胶290中。进一步地，散热粒子232为折射率与透明胶的折射率不相同或不一致的透明颗粒。
虽然已经参照特定实施例示出并描述了本发明，但是本领域的技术人员将理解：在不脱离由权利要求及其等同物限定的本发明的精神和范围的情况下，可在此进行形式和细节上的各种变化。

Claims (19)

  1. 一种导光板，其包括底面及与所述底面相对的出光面，其中，所述出光面下凹形成一凹槽，所述凹槽中填充若干发光量子点，所述出光面上覆盖封闭膜片，以将所述若干发光量子点封闭于所述凹槽中。
  2. 根据权利要求1所述的导光板，其中，所述导光板包括平板体及沿所述平板体一端向上延伸的楔形体，所述导光板的出光面包括所述平板体的顶面，所述导光板的底面包括所述平板体的底面及所述楔形体的底面。
  3. 根据权利要求1所述的导光板，其中，所述凹槽中填充透明胶，所述若干发光量子点均匀分散在所述透明胶中。
  4. 根据权利要求3所述的导光板，其中，所述透明胶的折射率与所述导光板的折射率相同。
  5. 根据权利要求4所述的导光板，其中，所述凹槽中还填充若干散射粒子，所述若干散射粒子与所述若干发光量子点共同均匀分散在所述透明胶中。
  6. 根据权利要求5所述的导光板，其中，所述散射粒子为透明颗粒，所述散射粒子的折射率与所述透明胶的折射率不相同。
  7. 根据权利要求3所述的导光板，其中，所述透明胶为紫外固化胶。
  8. 根据权利要求1所述的导光板，其中，所述封闭膜片为透明膜片。
  9. 一种背光模块，包括导光板，所述导光板包括底面及与所述底面相对的出光面，其中，所述出光面下凹形成一凹槽，所述凹槽中填充若干发光量子点，所述出光面上覆盖封闭膜片，以将所述若干发光量子点封闭于所述凹槽中。
  10. 根据权利要求9所述的背光模块，其中，所述导光板包括平板体及沿所述平板体一端向上延伸的楔形体，所述导光板的出光面包括所述平板体的顶面，所述导光板的底面包括所述平板体的底面及所述楔形体的底面。
  11. 根据权利要求9所述的背光模块，其中，所述凹槽中填充透明胶，所 述若干发光量子点均匀分散在所述透明胶中。
  12. 根据权利要求11所述的背光模块，其中，所述透明胶的折射率与所述导光板的折射率相同。
  13. 根据权利要求12所述的背光模块，其中，所述凹槽中还填充若干散射粒子，所述若干散射粒子与所述若干发光量子点共同均匀分散在所述透明胶中。
  14. 根据权利要求13所述的背光模块，其中，所述散射粒子为透明颗粒，所述散射粒子的折射率与所述透明胶的折射率不相同。
  15. 根据权利要求11所述的背光模块，其中，所述透明胶为紫外固化胶。
  16. 根据权利要求10所述的背光模块，其中，所述封闭膜片为透明膜片。
  17. 一种液晶显示器，包括相对设置的背光模块及液晶面板，所述背光模块包括导光板，所述导光板包括平板体及沿所述平板体一端向上延伸的楔形体，所述平板体的顶面朝向所述液晶面板，其中，所述平板体的顶面下凹形成一凹槽，所述凹槽中填充若干发光量子点，所述平板体的顶面上覆盖透明膜片，以将所述若干发光量子点封闭于所述凹槽中。
  18. 根据权利要求17所述的液晶显示器，其中，所述凹槽中填充与所述导光板的折射率相同的透明紫外固化胶，所述若干发光量子点均匀分散在所述透明紫外固化胶中。
  19. 根据权利要求18所述的液晶显示器，其中，所述凹槽中还填充若干与所述透明紫外固化胶的折射率不相同的透明散射粒子，所述若干透明散射粒子与所述若干发光量子点共同均匀分散在所述透明紫外固化胶中。
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Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102260013B1 (ko) * 2014-12-10 2021-06-04 삼성디스플레이 주식회사 표시 장치 및 이의 제조 방법
CN104793284A (zh) * 2015-04-30 2015-07-22 武汉华星光电技术有限公司 导光板、背光模块及液晶显示器
CN105158972A (zh) 2015-09-10 2015-12-16 深圳市华星光电技术有限公司 导光板及导光板的制备方法
CN105511011B (zh) * 2016-02-02 2016-12-28 苏州星烁纳米科技有限公司 导光板、背光模组和显示装置
KR102627073B1 (ko) * 2016-11-30 2024-01-19 삼성디스플레이 주식회사 백라이트 유닛, 표시 장치 및 표시 장치의 제조 방법
CN106647023A (zh) * 2016-12-09 2017-05-10 深圳市华星光电技术有限公司 一种量子点液晶显示装置及其制造方法
CN106597746A (zh) * 2016-12-31 2017-04-26 惠科股份有限公司 背光模块及显示装置
CN107193077A (zh) * 2017-07-24 2017-09-22 武汉华星光电技术有限公司 背光模块及液晶显示器
US10495923B2 (en) 2017-07-24 2019-12-03 Wuhan China Star Optoelectronics Technology Co., Ltd. Backlight module and liquid crystal display
CN108279460B (zh) * 2018-01-03 2020-01-21 上海中航光电子有限公司 一种量子点导光板、背光模组及显示装置
CN114035359A (zh) * 2021-10-09 2022-02-11 闽都创新实验室 基于灌注量子点技术的彩色滤光膜及其制备方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120050649A1 (en) * 2010-08-26 2012-03-01 Lg Innotek Co., Ltd. Display device
CN103076649A (zh) * 2011-10-25 2013-05-01 上海天马微电子有限公司 导光板与背光源
US8459855B2 (en) * 2008-07-28 2013-06-11 Munisamy Anandan UV LED based color pixel backlight incorporating quantum dots for increasing color gamut of LCD
CN203442699U (zh) * 2013-09-09 2014-02-19 深圳Tcl新技术有限公司 背光模组
CN103868024A (zh) * 2012-12-12 2014-06-18 友达光电股份有限公司 光源结构
CN104344328A (zh) * 2014-10-22 2015-02-11 汕头超声显示器（二厂）有限公司 一种用于高色域液晶显示器的背光模组及其制造方法
CN104793284A (zh) * 2015-04-30 2015-07-22 武汉华星光电技术有限公司 导光板、背光模块及液晶显示器

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6663262B2 (en) * 2001-09-10 2003-12-16 3M Innovative Properties Company Backlighting transmissive displays
CN101377586A (zh) * 2007-08-29 2009-03-04 奇力光电科技股份有限公司 背光模组及具有该背光模组的液晶显示装置
KR101631986B1 (ko) * 2009-02-18 2016-06-21 삼성전자주식회사 도광판 및 이를 포함하는 디스플레이 장치
CN201680228U (zh) * 2009-12-09 2010-12-22 金芃 Led背光源的采用带有v型槽的导光板的发光元件
US20110303940A1 (en) * 2010-06-14 2011-12-15 Hyo Jin Lee Light emitting device package using quantum dot, illumination apparatus and display apparatus
KR101710212B1 (ko) * 2010-12-28 2017-02-24 엘지전자 주식회사 광소자 및 이를 이용한 발광 다이오드 패키지, 백라이트 장치
KR101177480B1 (ko) * 2011-02-14 2012-08-24 엘지전자 주식회사 조명 장치 및 이를 포함하는 디스플레이 장치
CN103403892A (zh) * 2011-03-31 2013-11-20 松下电器产业株式会社 半导体发光装置
KR101673627B1 (ko) * 2011-08-31 2016-11-07 엘지이노텍 주식회사 광학 부재 및 표시장치
US20140036203A1 (en) * 2012-07-31 2014-02-06 Apple Inc. Light mixture for a display utilizing quantum dots
CN102937268A (zh) * 2012-11-15 2013-02-20 京东方科技集团股份有限公司 一种导光板、背光模组和显示装置
CN103901525A (zh) * 2012-12-28 2014-07-02 鸿富锦精密工业（深圳）有限公司 导光板、背光模块及液晶显示装置
CN103605234A (zh) * 2013-11-29 2014-02-26 Tcl集团股份有限公司 一种量子点彩色滤光片及液晶显示装置
CN104155803A (zh) * 2014-08-19 2014-11-19 深圳市华星光电技术有限公司 背光模块及液晶显示装置
CN104391350B (zh) * 2014-11-26 2018-01-16 深圳市华星光电技术有限公司 一种导光板及背光模组

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8459855B2 (en) * 2008-07-28 2013-06-11 Munisamy Anandan UV LED based color pixel backlight incorporating quantum dots for increasing color gamut of LCD
US20120050649A1 (en) * 2010-08-26 2012-03-01 Lg Innotek Co., Ltd. Display device
CN103076649A (zh) * 2011-10-25 2013-05-01 上海天马微电子有限公司 导光板与背光源
CN103868024A (zh) * 2012-12-12 2014-06-18 友达光电股份有限公司 光源结构
CN203442699U (zh) * 2013-09-09 2014-02-19 深圳Tcl新技术有限公司 背光模组
CN104344328A (zh) * 2014-10-22 2015-02-11 汕头超声显示器（二厂）有限公司 一种用于高色域液晶显示器的背光模组及其制造方法
CN104793284A (zh) * 2015-04-30 2015-07-22 武汉华星光电技术有限公司 导光板、背光模块及液晶显示器

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