WO2021109222A1 - 光转换结构及显示装置 - Google Patents

光转换结构及显示装置 Download PDF

Info

Publication number
WO2021109222A1
WO2021109222A1 PCT/CN2019/125558 CN2019125558W WO2021109222A1 WO 2021109222 A1 WO2021109222 A1 WO 2021109222A1 CN 2019125558 W CN2019125558 W CN 2019125558W WO 2021109222 A1 WO2021109222 A1 WO 2021109222A1
Authority
WO
WIPO (PCT)
Prior art keywords
light conversion
light
layer
conversion unit
refractive index
Prior art date
Application number
PCT/CN2019/125558
Other languages
English (en)
French (fr)
Inventor
霍英东
Original Assignee
深圳市华星光电半导体显示技术有限公司
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 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to US16/627,391 priority Critical patent/US11249336B2/en
Publication of WO2021109222A1 publication Critical patent/WO2021109222A1/zh

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133514—Colour filters
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13356—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements
    • G02F1/133562—Structural association of cells with optical devices, e.g. polarisers or reflectors characterised by the placement of the optical elements on the viewer side
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—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
    • 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
    • G02F1/133621—Illuminating devices providing coloured light

Definitions

  • This application relates to the field of display technology, in particular to a light conversion structure and a display device.
  • quantum dots QD, quantum dots
  • display technology is developing rapidly, and display products such as the application of quantum dots to backlights, color film substrates and organic light-emitting diode display panels have emerged.
  • the core technology is quantum dot light conversion technology.
  • the quantum dot display uses the narrow emission spectrum width after light conversion to obtain the high color gamut effect. Due to the low light conversion efficiency of quantum dots, it is necessary to set the quantum dot film layer thicker (micron level) in the device to increase the light conversion rate while absorbing excess blue light.
  • the embodiments of the present application provide a light conversion structure and a display device to solve the technical problem that the thickness of the quantum dot film layer is relatively thick on the premise that the high color gamut display effect is satisfied in the existing display products.
  • An embodiment of the present application provides a light conversion structure for light emission or/and display, wherein the light conversion structure includes:
  • a base layer having a first refractive index
  • An intermediate layer is disposed on the base layer, and the intermediate layer has a second refractive index
  • Light conversion layer the light conversion layer is the light exit side, the light conversion layer is disposed on the intermediate layer, the light conversion layer has a third refractive index, the light conversion layer includes a first light conversion unit, a second The second light conversion unit and the third light conversion unit, the first light conversion unit, the second light conversion unit and the third light conversion unit emit light in different colors;
  • the second refractive index is greater than the first refractive index, and the second refractive index is greater than the third refractive index;
  • the first refractive index is less than or equal to the third refractive index;
  • the material of the light conversion layer is one of quantum dots, phosphors or perovskite.
  • the thickness of the light conversion layer is between 190 nanometers and 240 nanometers.
  • the first light conversion unit emits red light
  • the second light conversion unit emits green light
  • the third light conversion unit emits blue light
  • the material of the first light conversion unit is red quantum dots
  • the material of the second light conversion unit is green quantum dots
  • the material of the third light conversion unit It is a blue quantum dot.
  • the embodiment of the present application provides another light conversion structure for light emission or/and display, and the light conversion structure includes:
  • a base layer is the light incident side, and the base layer has a first refractive index
  • An intermediate layer is disposed on the base layer, and the intermediate layer has a second refractive index
  • Light conversion layer the light conversion layer is the light exit side, the light conversion layer is disposed on the intermediate layer, the light conversion layer has a third refractive index, the light conversion layer includes a first light conversion unit, a second The second light conversion unit and the third light conversion unit, the first light conversion unit, the second light conversion unit and the third light conversion unit emit light in different colors;
  • the second refractive index is greater than the first refractive index, and the second refractive index is greater than the third refractive index.
  • the first refractive index is less than or equal to the third refractive index.
  • the material of the light conversion layer is one of quantum dots, phosphors, or perovskite.
  • the first light conversion unit emits red light
  • the second light conversion unit emits green light
  • the third light conversion unit emits blue light
  • the material of the first light conversion unit is red quantum dots
  • the material of the second light conversion unit is green quantum dots
  • the material of the third light conversion unit It is a blue quantum dot.
  • the thickness of the light conversion layer is between 190 nanometers and 240 nanometers.
  • the thickness of the light conversion layer is 200 nanometers.
  • the first light conversion unit emits red light
  • the second light conversion unit emits green light
  • the third light conversion unit emits blue light
  • the present application also relates to a display device, wherein the display device includes a backlight module and a liquid crystal cell, the liquid crystal cell is arranged on the light emitting side of the backlight module, and the backlight module includes a light source and a light source arranged on the light source.
  • a base layer having a first refractive index
  • An intermediate layer is disposed on the base layer, and the intermediate layer has a second refractive index
  • Light conversion layer the light conversion layer is the light exit side, the light conversion layer is disposed on the intermediate layer, the light conversion layer has a third refractive index, the light conversion layer includes a first light conversion unit, a second The second light conversion unit and the third light conversion unit, the first light conversion unit, the second light conversion unit and the third light conversion unit emit light in different colors;
  • the second refractive index is greater than the first refractive index, and the second refractive index is greater than the third refractive index.
  • the first refractive index is less than or equal to the third refractive index.
  • the material of the light conversion layer is one of quantum dots, phosphors or perovskite.
  • the first light conversion unit is a red light conversion unit
  • the second light conversion unit is a green light conversion unit
  • the third light conversion unit is a blue light conversion unit.
  • the liquid crystal cell includes an array substrate, a color filter substrate, and a liquid crystal layer, and the liquid crystal layer is disposed between the array substrate and the color filter substrate; the color filter The substrate includes a base and an electrode layer provided on the base.
  • the thickness of the light conversion layer is between 190 nanometers and 240 nanometers.
  • the light conversion structure of the present application uses the base layer as the light entrance side and the light conversion layer as the light exit side, and adopts a design with a second refractive index greater than the first refractive index, so that the intermediate layer and the light conversion layer form a light reflection interface, and use light
  • the evanescent wave of light entering the light conversion layer can excite the light conversion layer to radiate fluorescence. Therefore, the light conversion efficiency of the light conversion layer is improved through the action of the evanescent wave.
  • FIG. 1 is a schematic structural diagram of a light conversion structure according to an embodiment of the application.
  • FIG. 2 is a schematic structural diagram of a display device according to an embodiment of the application.
  • FIG. 3 is a schematic diagram of the structure of the liquid crystal cell of the display device according to the embodiment of the application.
  • FIG. 1 is a schematic structural diagram of a light conversion structure according to an embodiment of the application.
  • the light conversion structure 100 of the embodiment of the present application is used for light emission or/and display.
  • the light received by the light conversion structure 100 is preferably light with a narrow spectral width, such as blue light.
  • the light conversion structure 100 can emit light with a narrow spectral width to obtain a high color gamut effect.
  • the light conversion structure 100 of this embodiment can be applied to a backlight module, a color film substrate, a liquid crystal display panel, an organic light emitting diode display panel, an LED display panel, and the like.
  • the light conversion structure 100 of this embodiment includes a base layer 11, an intermediate layer 12, and a light conversion layer 13 arranged in sequence.
  • the base layer 11 is the light incident side.
  • the base layer 11 has a first refractive index n1.
  • the intermediate layer 12 is provided on the base layer 11.
  • the intermediate layer 12 has a second refractive index n2.
  • the light-incident side of the light conversion structure 100 may also be on both sides thereof, that is, the side of the light conversion structure 100 is used as the light-incident side, for example, the side of the intermediate layer 12 is the light-incident side.
  • the light conversion layer 13 is the light emitting side.
  • the light conversion layer 13 is provided on the intermediate layer 12.
  • the light conversion layer 13 has a third refractive index n3.
  • the light conversion layer 13 includes a first light conversion unit 131, a second light conversion unit 132 and a third light conversion unit 133.
  • the first light conversion unit 131, the second light conversion unit 132, and the third light conversion unit 133 lightly convert and emit light in different colors.
  • the second refractive index n2 is greater than the first refractive index n1.
  • the second refractive index n2 is greater than the third refractive index n3.
  • the second refractive index n2 is set to be greater than the first refractive index n1.
  • the incident angle of the light is greater than the critical angle of total internal reflection
  • the light is at the interface between the intermediate layer 12 and the light conversion layer 13 Total internal reflection occurs.
  • the light waves propagating in the light conversion layer 13 are evanescent waves.
  • the evanescent wave will excite the light conversion layer 13 and cause the light conversion layer 13 to radiate fluorescence.
  • the first light conversion unit is formed of a red material, it emits red light.
  • the material of the light conversion layer 13 is one of quantum dots, phosphors or perovskite.
  • the material of the light conversion layer 13 is quantum dots.
  • the depth range of the evanescent wave in the quantum dot film (light conversion layer 13) is about 200 nanometers. Therefore, the thickness of the quantum dot film layer (light conversion layer 13) can be set between 190 nanometers and 240 nanometers. Preferably, the thickness of the light conversion layer 13 is 200 nanometers.
  • the light conversion structure 100 of the present embodiment sets the second refractive index n2 to be greater than the first refractive index n1, which reduces the amount required for the quantum dot film layer. thickness.
  • the remaining light after light conversion with the light conversion layer 13 will return to the intermediate layer 12 according to the law of reflection, and since the second refractive index n2 is set to be greater than the third The refractive index is n3, so the reflected light is totally internally reflected at the interface between the intermediate layer 12 and the base layer 11, and the light is directed to the light conversion layer 13 again, and the light conversion layer 13 is re-excited, which improves the utilization rate of light.
  • the first refractive index n1 is less than or equal to the third refractive index n3.
  • This arrangement prevents a very small portion of the light reflected from the interface between the intermediate layer 12 and the light conversion layer 13 from passing through the base layer 11. In other words, it is ensured that the light reflected from the interface of the intermediate layer 12 and the light conversion layer 13 undergoes total internal reflection at the interface of the intermediate layer 12 and the base layer 11, and forms a light guiding effect similar to a slab waveguide, which further improves the light resistance. Utilization rate.
  • the first light conversion unit 131 emits red light
  • the second light conversion unit 132 emits green light
  • the third light conversion unit 133 emits blue light
  • the material of the first light conversion unit 131 is red quantum dots
  • the material of the second light conversion unit 132 is green quantum dots
  • the material of the third light conversion unit 133 is blue quantum dots.
  • the display device 200 of the embodiment of the present application includes a backlight module 21 and a liquid crystal cell 22.
  • the liquid crystal cell 22 is arranged on the light emitting side of the backlight module 21.
  • the backlight module 21 includes a light source 211 and a light conversion structure 212 arranged on the light emitting side of the light source 211.
  • the light source 211 emits blue light.
  • the light conversion structure 212 is a side light structure.
  • the light conversion structure 212 includes a base layer, an intermediate layer, and a light conversion layer that are sequentially arranged.
  • the base layer has a first refractive index n1.
  • the middle layer is arranged on the base layer.
  • the intermediate layer has a second refractive index n2.
  • the light conversion layer is the light emitting side.
  • the light conversion layer is arranged on the middle layer.
  • the light conversion layer has a third refractive index n3.
  • the light conversion layer includes a first light conversion unit, a second light conversion unit, and a third light conversion unit. The first light conversion unit, the second light conversion unit, and the third light conversion unit lightly convert and emit light in different colors.
  • the second refractive index n2 is greater than the first refractive index n1.
  • the second refractive index n2 is greater than the third refractive index n3.
  • the material of the light conversion layer is one of quantum dots, phosphors or perovskite.
  • the material of the light conversion layer is quantum dots.
  • the depth range of the evanescent wave in the quantum dot film (light conversion layer) is about 200 nanometers. Therefore, the thickness of the quantum dot film (light conversion layer) can be set between 190 nanometers and 240 nanometers. Preferably, the thickness of the light conversion layer is 200 nanometers.
  • the first refractive index n1 is less than or equal to the third refractive index n3.
  • the first light conversion unit is a red light conversion unit
  • the second light conversion unit is a green light conversion unit
  • the third light conversion unit is a blue light conversion unit.
  • the first light conversion unit emits red light
  • the second light conversion unit emits green light
  • the third light conversion unit emits blue light
  • the material of the first light conversion unit is red quantum dots
  • the material of the second light conversion unit is green quantum dots
  • the material of the third light conversion unit is blue quantum dots.
  • the liquid crystal cell 22 includes an array substrate 221, a color filter substrate 222 and a liquid crystal layer 223.
  • the liquid crystal layer 223 is disposed between the array substrate 221 and the color filter substrate 222.
  • the color filter substrate 222 includes a base and an electrode layer disposed on the base. Since the backlight module 21 is provided with a light conversion structure 212, and the light conversion structure 212 has the function of filtering light to emit three-color light. Therefore, the function of the light conversion layer in the light conversion structure 212 is equivalent to the color filter layer of the color filter substrate in the prior art, that is, the color filter substrate 222 of the display device 200 of this embodiment does not include a color filter layer.
  • the light conversion structure 212 is used as a backlight, which not only saves the light guide plate, but also replaces the color film layer of the color film substrate in the prior art.
  • the light conversion structure 212 of the display device 200 of this embodiment has the same structure as the light conversion structure 100 of the foregoing embodiment. For details, please refer to the description of the light conversion structure 100 of the foregoing embodiment, which will not be repeated here.

Landscapes

  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Led Device Packages (AREA)
  • Optical Filters (AREA)

Abstract

一种光转换结构（100）和显示装置（200），光转换结构（100）包括基底层（11）、中间层（12）和光转换层（13），基底层（11）具有第一折射率（n1）；中间层（12）具有第二折射率（n2）；光转换层（13）具有第三折射率（n3），光转换层（13）包括第一光转换单元（131）、第二光转换单元（132）和第三光转换单元（133），第一光转换单元（131）、第二光转换单元（132）和第三光转换单元（133）发出的光颜色不同；第二折射率（n2）分别大于第一折射率（n1）和第三折射率（n3）。

Description

光转换结构及显示装置 技术领域
本申请涉及一种显示技术领域，特别涉及一种光转换结构及显示装置。
 背景技术
目前，量子点（QD, quantum dots）显示技术发展迅速，已经出现了如将量子点应用于背光、彩膜基板和有机发光二极管显示面板等显示产品，其核心技术是量子点光转换技术。量子点显示正是利用光转换后的发射光谱宽度较窄而获得高色域效果。由于量子点本身光转换效率较低，在器件中需要将量子点膜层设置得较厚（微米级）来提高光转换率，同时吸收多余的蓝光。
 技术问题
本申请实施例提供一种光转换结构及显示装置，以解决现有的显示产品中，在满足高色域显示效果的前提下，量子点膜层的厚度较厚的技术问题。
 技术解决方案
本申请实施例提供一种光转换结构，用于发光或/和显示，其中，所述光转换结构包括：
基底层，所述基底层具有第一折射率；
中间层，所述中间层设置在所述基底层上，所述中间层具有第二折射率；以及
光转换层，所述光转换层为出光侧，所述光转换层设置在所述中间层上，所述光转换层具有第三折射率，所述光转换层包括第一光转换单元、第二光转换单元和第三光转换单元，所述第一光转换单元、第二光转换单元和第三光转换单元光转换发出的光颜色不同；
所述第二折射率大于所述第一折射率，所述第二折射率大于所述第三折射率；
所述第一折射率小于或等于所述第三折射率；所述光转换层的材料为量子点、荧光粉或钙钛矿中的一种。
在本申请实施例的所述光转换结构中，所述光转换层的厚度介于190纳米至240纳米之间。
在本申请实施例的所述光转换结构中，所述第一光转换单元发红光，所述第二光转换单元发绿光，所述第三光转换单元发蓝光。
在本申请实施例的所述光转换结构中，所述第一光转换单元的材料为红色量子点，所述第二光转换单元的材料为绿色量子点，所述第三光转换单元的材料为蓝色量子点。
本申请实施例提供另一种光转换结构，用于发光或/和显示，所述光转换结构包括：
基底层，所述基底层为入光侧，所述基底层具有第一折射率；
中间层，所述中间层设置在所述基底层上，所述中间层具有第二折射率；以及
光转换层，所述光转换层为出光侧，所述光转换层设置在所述中间层上，所述光转换层具有第三折射率，所述光转换层包括第一光转换单元、第二光转换单元和第三光转换单元，所述第一光转换单元、第二光转换单元和第三光转换单元光转换发出的光颜色不同；
所述第二折射率大于所述第一折射率，所述第二折射率大于所述第三折射率。
在本申请实施例的所述光转换结构中，所述第一折射率小于或等于所述第三折射率。
在本申请实施例的所述光转换结构中，所述光转换层的材料为量子点、荧光粉或钙钛矿中的一种。
在本申请实施例的所述光转换结构中，所述第一光转换单元发红光，所述第二光转换单元发绿光，所述第三光转换单元发蓝光。
在本申请实施例的所述光转换结构中，所述第一光转换单元的材料为红色量子点，所述第二光转换单元的材料为绿色量子点，所述第三光转换单元的材料为蓝色量子点。
在本申请实施例的所述光转换结构中，所述光转换层的厚度介于190纳米至240纳米之间。
在本申请实施例的所述光转换结构中，所述光转换层的厚度为200纳米。
在本申请实施例的所述光转换结构中，所述第一光转换单元发红光，所述第二光转换单元发绿光，所述第三光转换单元发蓝光。
本申请还涉及一种显示装置，其中，所述显示装置包括背光模组和液晶盒，所述液晶盒设置在所述背光模组的出光侧，所述背光模组包括光源和设置在光源出光侧的光转换结构，所述光源发射蓝光；所述光转换结构包括：
基底层，所述基底层具有第一折射率；
中间层，所述中间层设置在所述基底层上，所述中间层具有第二折射率；以及
光转换层，所述光转换层为出光侧，所述光转换层设置在所述中间层上，所述光转换层具有第三折射率，所述光转换层包括第一光转换单元、第二光转换单元和第三光转换单元，所述第一光转换单元、第二光转换单元和第三光转换单元光转换发出的光颜色不同；
所述第二折射率大于所述第一折射率，所述第二折射率大于所述第三折射率。
在本申请实施例的所述显示装置中，所述第一折射率小于或等于所述第三折射率。
在本申请实施例的所述显示装置中，所述光转换层的材料为量子点、荧光粉或钙钛矿中的一种。
在本申请实施例的所述显示装置中，所述第一光转换单元为红色光转换单元，所述第二光转换单元为绿色光转换单元，第三光转换单元为蓝色光转换单元。
在本申请实施例的所述显示装置中，所述液晶盒包括阵列基板、彩膜基板和液晶层，所述液晶层设置在所述阵列基板和所述彩膜基板之间；所述彩膜基板包括基底和设置在所述基底上的电极层。
在本申请实施例的所述显示装置中，所述光转换层的厚度介于190纳米至240纳米之间。
 有益效果
本申请的光转换结构以基底层作为入光侧，以光转换层作为出光侧，且采用第二折射率大于第一折射率设计，使得中间层与光转化层形成光反射界面，并利用光发生全内反射时，光进入光转化层的倏逝波可以激发光转化层辐射荧光。因此通过倏逝波的作用提高了光转化层的光转化效率。
 附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面对实施例中所需要使用的附图作简单的介绍。下面描述中的附图仅为本申请的部分实施例，对于本领域普通技术人员而言，在不付出创造性劳动的前提下，还可以根据这些附图获取其他的附图。
图1为本申请实施例的光转换结构的结构示意图；
图2为本申请实施例的显示装置的结构示意图；
图3为本申请实施例的显示装置的液晶盒的结构示意图。
 本发明的实施方式
请参照附图中的图式，其中相同的组件符号代表相同的组件。以下的说明是基于所例示的本申请具体实施例，其不应被视为限制本申请未在此详述的其它具体实施例。
请参照图1，图1为本申请实施例的光转换结构的结构示意图。本申请实施例的光转换结构100用于发光或/和显示。本实施例在应用于显示领域时，光转换结构100接收的光线最好为光谱宽度较窄的光线，比如蓝色光。当光线辐射至本实施例的光转换结构100时，光转换结构100可发射出光谱宽度较窄的光线而获得高色域效果。其中，本实施例的光转换结构100可以应用于背光模组、彩膜基板、液晶显示面板、有机发光二极管显示面板和LED显示面板等。
本实施例的光转换结构100包括依次设置的基底层11、中间层12和光转换层13。
基底层11为入光侧。基底层11具有第一折射率n1。中间层12设置在基底层11上。中间层12具有第二折射率n2。在一些实施例中，光转换结构100的入光侧也可以在其两侧，即以光转换结构100的侧边作为入光侧，比如以中间层12的一侧为入光侧。
光转换层13为出光侧。光转换层13设置在中间层12上。光转换层13具有第三折射率n3。光转换层13包括第一光转换单元131、第二光转换单元132和第三光转换单元133。第一光转换单元131、第二光转换单元132和第三光转换单元133光转换发出的光颜色不同。
第二折射率n2大于第一折射率n1。第二折射率n2大于第三折射率n3。
在本实施例的光转换结构100中，将第二折射率n2设置为大于第一折射率n1，当光线的入射角大于全内反射临界角时，光线在中间层12和光转换层13的界面发生全内反射。但事实上，光线辐射至光转换层13且在反射之前，其光能量会进入光转换层13一定的深度，而进入光转换层13内传播的光波为倏逝波。此时倏逝波会激发光转换层13，促使光转换层13辐射荧光。比如第一光转换单元为红色材料形成，则发出红色光。
可选的，光转换层13的材料为量子点、荧光粉或钙钛矿中的一种。在本实施例的光转换层13中，光转换层13的材料为量子点。而倏逝波在量子点膜层（光转换层13）的深入范围大约在200纳米。因此量子点膜层（光转换层13）的厚度可设置为介于190纳米至240纳米之间。优选的，光转换层13的厚度为200纳米。
因此相较于现有技术的用于显示领域的量子点膜层，本实施例的光转换结构100将第二折射率n2设置为大于第一折射率n1，降低了量子点膜层所需的厚度。
另外，在本实施例的光转换结构100中，当与光转换层13光转换作用后剩余的光会按照反射定律回到中间层12中，而由于将第二折射率n2设置为大于第三折射率n3，因此反射回的光线在中间层12和基底层11的界面发生全内反射，将光线再次导向光转换层13，对光转换层13进行二次激发，提高了光的利用率。
进一步的，第一折射率n1小于或等于第三折射率n3。这样的设置，避免了极小部分从中间层12和光转换层13的界面反射的光线透过基底层11。也就是说，确保了从中间层12和光转换层13的界面反射的光线在中间层12和基底层11的界面发生全内反射，并形成类似平板波导的导光效果，进一步提高了对光线的利用率。
在本申请实施例的光转换结构100中，第一光转换单元131发红光，第二光转换单元132发绿光，第三光转换单元133发蓝光。具体的，第一光转换单元131的材料为红色量子点，第二光转换单元132的材料为绿色量子点，第三光转换单元133的材料为蓝色量子点。
请参照图2，本申请实施例的显示装置200包括背光模组21和液晶盒22。液晶盒22设置在背光模组21的出光侧。背光模组21包括光源211和设置在光源211出光侧的光转换结构212。光源211发射蓝光。
光转换结构212为侧入光结构。光转换结构212包括依次设置的基底层、中间层和光转换层。
基底层具有第一折射率n1。中间层设置在基底层上。中间层具有第二折射率n2。
光转换层为出光侧。光转换层设置在中间层上。光转换层具有第三折射率n3。光转换层包括第一光转换单元、第二光转换单元和第三光转换单元。第一光转换单元、第二光转换单元和第三光转换单元光转换发出的光颜色不同。
第二折射率n2大于第一折射率n1。第二折射率n2大于第三折射率n3。
可选的，光转换层的材料为量子点、荧光粉或钙钛矿中的一种。在本实施例的显示装置200中，光转换层的材料为量子点。而倏逝波在量子点膜层（光转换层）的深入范围大约在200纳米。因此量子点膜层（光转换层）的厚度可设置为介于190纳米至240纳米之间。优选的，光转换层的厚度为200纳米。
进一步的，第一折射率n1小于或等于第三折射率n3。
在本申请实施例的显示装置200中，第一光转换单元为红色光转换单元，第二光转换单元为绿色光转换单元，第三光转换单元为蓝色光转换单元。
第一光转换单元发红光，第二光转换单元发绿光，第三光转换单元发蓝光。具体的，第一光转换单元的材料为红色量子点，第二光转换单元的材料为绿色量子点，第三光转换单元的材料为蓝色量子点。
请参照图3，液晶盒22包括阵列基板221、彩膜基板222和液晶层223。液晶层223设置在阵列基板221和彩膜基板222之间。彩膜基板222包括基底和设置在基底上的电极层。由于背光模组21中具备有光转换结构212，且光转换结构212具有过滤的光线的作用，以发出三色光。因此光转换结构212中的光转换层的作用相当于现有技术的彩膜基板的彩膜层，即本实施例的显示装置200的彩膜基板222不包含彩膜层。
因此光转换结构212作为背光，不但节省了导光板，而且替代了现有技术彩膜基板的彩膜层。
本实施例的显示装置200的光转换结构212和上述实施例的光转换结构100的结构相同，具体请参照上述实施例的光转换结构100的阐述内容，此处不再赘述。
以上所述，对于本领域的普通技术人员来说，可以根据本申请的技术方案和技术构思作出其他各种相应的改变和变形，而所有这些改变和变形都应属于本申请后附的权利要求的保护范围。

Claims (16)

  1. 一种光转换结构，用于发光或/和显示，其中，所述光转换结构包括：
    基底层，所述基底层具有第一折射率；
    中间层，所述中间层设置在所述基底层上，所述中间层具有第二折射率；以及
    光转换层，所述光转换层为出光侧，所述光转换层设置在所述中间层上，所述光转换层具有第三折射率，所述光转换层包括第一光转换单元、第二光转换单元和第三光转换单元，所述第一光转换单元、第二光转换单元和第三光转换单元光转换发出的光颜色不同；
    所述第二折射率大于所述第一折射率，所述第二折射率大于所述第三折射率；
    所述第一折射率小于或等于所述第三折射率；所述光转换层的材料为量子点、荧光粉或钙钛矿中的一种。
  2. 根据权利要求1所述的光转换结构，其中，所述光转换层的厚度介于190纳米至240纳米之间。
  3. 根据权利要求1所述的光转换结构，其中，所述第一光转换单元发红光，所述第二光转换单元发绿光，所述第三光转换单元发蓝光。
  4. 根据权利要求3所述的光转换结构，其中，所述第一光转换单元的材料为红色量子点，所述第二光转换单元的材料为绿色量子点，所述第三光转换单元的材料为蓝色量子点。
  5. 一种光转换结构，用于发光或/和显示，其中，所述光转换结构包括：
    基底层，所述基底层具有第一折射率；
    中间层，所述中间层设置在所述基底层上，所述中间层具有第二折射率；以及
    光转换层，所述光转换层为出光侧，所述光转换层设置在所述中间层上，所述光转换层具有第三折射率，所述光转换层包括第一光转换单元、第二光转换单元和第三光转换单元，所述第一光转换单元、第二光转换单元和第三光转换单元光转换发出的光颜色不同；
    所述第二折射率大于所述第一折射率，所述第二折射率大于所述第三折射率。
  6. 根据权利要求5所述的光转换结构，其中，所述第一折射率小于或等于所述第三折射率。
  7. 根据权利要求5所述的光转换结构，其中，所述光转换层的材料为量子点、荧光粉或钙钛矿中的一种。
  8. 根据权利要求5所述的光转换结构，其中，所述第一光转换单元发红光，所述第二光转换单元发绿光，所述第三光转换单元发蓝光。
  9. 根据权利要求8所述的光转换结构，其中，所述第一光转换单元的材料为红色量子点，所述第二光转换单元的材料为绿色量子点，所述第三光转换单元的材料为蓝色量子点。
  10. 根据权利要求5所述的光转换结构，其中，所述光转换层的厚度介于190纳米至240纳米之间。
  11. 一种显示装置，其中，所述显示装置包括背光模组和液晶盒，所述液晶盒设置在所述背光模组的出光侧，所述背光模组包括光源和设置在光源出光侧的光转换结构，所述光源发射蓝光；所述光转换结构包括：
    基底层，所述基底层具有第一折射率；
    中间层，所述中间层设置在所述基底层上，所述中间层具有第二折射率；以及
    光转换层，所述光转换层为出光侧，所述光转换层设置在所述中间层上，所述光转换层具有第三折射率，所述光转换层包括第一光转换单元、第二光转换单元和第三光转换单元，所述第一光转换单元、第二光转换单元和第三光转换单元光转换发出的光颜色不同；
    所述第二折射率大于所述第一折射率，所述第二折射率大于所述第三折射率。
  12. 根据权利要求11所述的显示装置，其中，所述第一折射率小于或等于所述第三折射率。
  13. 根据权利要求11所述的显示装置，其中，所述光转换层的材料为量子点、荧光粉或钙钛矿中的一种。
  14. 根据权利要求11所述的显示装置，其中，所述第一光转换单元为红色光转换单元，所述第二光转换单元为绿色光转换单元，第三光转换单元为蓝色光转换单元。
  15. 根据权利要求14所述的显示装置，其中，所述液晶盒包括阵列基板、彩膜基板和液晶层，所述液晶层设置在所述阵列基板和所述彩膜基板之间；所述彩膜基板包括基底和设置在所述基底上的电极层。
  16. 根据权利要求11所述的显示装置，其中，所述光转换层的厚度介于190纳米至240纳米之间。
PCT/CN2019/125558 2019-12-06 2019-12-16 光转换结构及显示装置 WO2021109222A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/627,391 US11249336B2 (en) 2019-12-06 2019-12-16 Optical conversion structure and display device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201911239864.8A CN111045250A (zh) 2019-12-06 2019-12-06 光转换结构及显示装置
CN201911239864.8 2019-12-06

Publications (1)

Publication Number Publication Date
WO2021109222A1 true WO2021109222A1 (zh) 2021-06-10

Family

ID=70234912

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/125558 WO2021109222A1 (zh) 2019-12-06 2019-12-16 光转换结构及显示装置

Country Status (3)

Country Link
US (1) US11249336B2 (zh)
CN (1) CN111045250A (zh)
WO (1) WO2021109222A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114039009B (zh) * 2020-12-23 2023-09-22 广东聚华印刷显示技术有限公司 光转换膜、光转换基片和发光二极管
WO2022261945A1 (zh) * 2021-06-18 2022-12-22 京东方科技集团股份有限公司 显示面板、显示装置和显示面板的制作方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100891801B1 (ko) * 2007-11-30 2009-04-07 삼성전기주식회사 질화물 반도체 발광소자
CN103278961A (zh) * 2013-04-28 2013-09-04 京东方科技集团股份有限公司 一种液晶显示装置
CN206116453U (zh) * 2016-10-08 2017-04-19 广东晶科电子股份有限公司 一种白光led及其背光模组
CN106773287A (zh) * 2016-12-06 2017-05-31 青岛海信电器股份有限公司 一种封装量子点材料显示面板以及包含该面板的背光模组
CN107193070A (zh) * 2017-08-01 2017-09-22 京东方科技集团股份有限公司 一种光场调制层、背光结构及显示装置
CN110320705A (zh) * 2018-03-29 2019-10-11 三星显示有限公司 显示设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9274369B1 (en) * 2012-10-30 2016-03-01 Google Inc. Seamless display with tapered fused fiber bundle overlay
KR102223001B1 (ko) * 2015-01-05 2021-03-04 삼성디스플레이 주식회사 표시 장치
JP6550992B2 (ja) * 2015-07-14 2019-07-31 大日本印刷株式会社 量子ドットシート、バックライト及び液晶表示装置
KR20170014755A (ko) 2015-07-31 2017-02-08 삼성전자주식회사 디스플레이 패널 및 이를 포함하는 디스플레이 장치
CN108761896A (zh) * 2018-07-18 2018-11-06 明基材料有限公司 偏光板
KR102651856B1 (ko) * 2018-09-11 2024-03-28 삼성디스플레이 주식회사 색 변환 소자 및 이를 포함하는 표시 장치
CN110459560B (zh) * 2019-07-26 2021-09-03 深圳市华星光电半导体显示技术有限公司 一种量子点显示面板及显示装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100891801B1 (ko) * 2007-11-30 2009-04-07 삼성전기주식회사 질화물 반도체 발광소자
CN103278961A (zh) * 2013-04-28 2013-09-04 京东方科技集团股份有限公司 一种液晶显示装置
CN206116453U (zh) * 2016-10-08 2017-04-19 广东晶科电子股份有限公司 一种白光led及其背光模组
CN106773287A (zh) * 2016-12-06 2017-05-31 青岛海信电器股份有限公司 一种封装量子点材料显示面板以及包含该面板的背光模组
CN107193070A (zh) * 2017-08-01 2017-09-22 京东方科技集团股份有限公司 一种光场调制层、背光结构及显示装置
CN110320705A (zh) * 2018-03-29 2019-10-11 三星显示有限公司 显示设备

Also Published As

Publication number Publication date
US20210405443A1 (en) 2021-12-30
US11249336B2 (en) 2022-02-15
CN111045250A (zh) 2020-04-21

Similar Documents

Publication Publication Date Title
JP6532179B2 (ja) 照明装置、表示装置、及びテレビ受信装置
US10845641B2 (en) Direct backlight module and liquid crystal display device
US10222543B2 (en) Lighting device, display device, and television device
US10007054B2 (en) Backlight assembly and display device having the same
CN108196336B (zh) 一种导光板、背光模组、显示装置
JP6554534B2 (ja) 照明装置、表示装置、及びテレビ受信装置
JP2007149665A (ja) 光源から離れた蛍光体を用いる照明システム
JP2007188035A (ja) 酸化物を積層してなる光学層が形成されているバックライトユニット
TW201241536A (en) Optical member and display device including the same
US20210080785A1 (en) Backlight module
WO2017193418A1 (zh) 量子点背光模组
CN210605291U (zh) 一种背光模组和液晶显示装置
CN111063269A (zh) 显示面板
CN106647042B (zh) 一种光源器件及显示装置
WO2020056912A1 (zh) 背光模组
WO2015081692A1 (zh) 一种导光板、背光源及液晶显示装置
US9606283B2 (en) Surface light source, backlight module and display device
CN105739176B (zh) 背光模组和显示装置
US20190004374A1 (en) Backlight module and a display device
CN104155803A (zh) 背光模块及液晶显示装置
CN110018592A (zh) 背光单元和包括其的显示设备
WO2021109222A1 (zh) 光转换结构及显示装置
WO2020087779A1 (zh) 一种面光源显示模组
WO2019127728A1 (zh) 用于背光模块的量子点膜、背光模块及液晶显示器
US20210080636A1 (en) Backlight module and a display device

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: 19954772

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: 19954772

Country of ref document: EP

Kind code of ref document: A1