[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2018166025A1 - 一种显示装置 - Google Patents

一种显示装置 Download PDF

Info

Publication number
WO2018166025A1
WO2018166025A1 PCT/CN2017/080412 CN2017080412W WO2018166025A1 WO 2018166025 A1 WO2018166025 A1 WO 2018166025A1 CN 2017080412 W CN2017080412 W CN 2017080412W WO 2018166025 A1 WO2018166025 A1 WO 2018166025A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
layer
refractive index
quantum dot
wavelength
Prior art date
Application number
PCT/CN2017/080412
Other languages
English (en)
French (fr)
Inventor
樊勇
Original Assignee
深圳市华星光电技术有限公司
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 深圳市华星光电技术有限公司 filed Critical 深圳市华星光电技术有限公司
Priority to US15/520,388 priority Critical patent/US20180299727A1/en
Publication of WO2018166025A1 publication Critical patent/WO2018166025A1/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
    • G02F1/1336—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
    • G02F1/1336—Illuminating devices
    • G02F1/133617—Illumination with ultraviolet light; Luminescent elements or materials associated to the cell
    • 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
    • G02F1/133555—Transflectors
    • 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
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133621—Illuminating devices providing coloured 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
    • G02F1/13356—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
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/17—Multi-pass arrangements, i.e. arrangements to pass light a plurality of times through the same element, e.g. by using an enhancement cavity
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2201/00—Constructional arrangements not provided for in groups G02F1/00 - G02F7/00
    • G02F2201/50—Protective arrangements
    • G02F2201/501—Blocking layers, e.g. against migration of ions
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/10—Materials and properties semiconductor
    • G02F2202/106—Cd×Se or Cd×Te and alloys
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/10—Materials and properties semiconductor
    • G02F2202/108—Materials and properties semiconductor quantum wells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2202/00—Materials and properties
    • G02F2202/36—Micro- or nanomaterials
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/05—Function characteristic wavelength dependent
    • 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
    • G02F2203/00—Function characteristic
    • G02F2203/05—Function characteristic wavelength dependent
    • G02F2203/055—Function characteristic wavelength dependent wavelength filtering

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a display device.
  • Quantum dots are used in displays to improve the display color gamut of displays due to their adjustable luminescence spectrum and high luminous efficiency.
  • quantum dots and cadmium-free quantum dots can be classified into cadmium-containing materials.
  • the cadmium-containing quantum dots have higher luminescence efficiency than the cadmium-free quantum dots, and the luminescence spectrum is narrower, so the cadmium-containing quantum dots are more effective when applied to displays.
  • cadmium is an element that is required to limit the concentration in the "Restrictions on the Use of Certain Hazardous Components in Electrical and Electronic Equipment” (ROHS) standards, when selecting cadmium-containing quantum dots for use in displays, it is necessary to Under the premise of affecting the display effect of the display, the content of cadmium in the quantum dots is lowered.
  • ROHS Electrical and Electronic Equipment
  • the invention mainly provides a thin film transistor and a preparation method thereof, aiming at solving the problem of reducing the quantum dot content without affecting the luminescent effect.
  • the present invention adopts a technical solution to provide a display device, wherein the display device includes a display panel and a backlight; wherein the display panel includes an upper substrate and a lower substrate disposed opposite to each other.
  • the upper substrate is provided with a reflective filter layer and a color light-emitting layer stacked in this order from top to bottom, wherein the color light-emitting layer comprises a red quantum dot region, a green quantum dot region and a blue quantum dot region, and the backlight Located below the lower substrate and providing light to the color luminescent layer, such that the color luminescent layer emits red, green, and blue light, respectively, and is permeable from the reflective filter layer, the reflective filter layer And partially reflecting the light emitted from the backlight to the reflective filter layer to the color light emitting layer to re-energize the color light emitting layer to enhance light efficiency; the reflective filter layer is used for reflecting light wavelength less than Or light of a predetermined wavelength value, and for transmitting light having a wavelength
  • another technical solution adopted by the present invention is to provide a display device, wherein the display device includes a display panel and a backlight; wherein the display panel includes opposite upper and lower substrates
  • the upper substrate is provided with a reflective filter layer and a color light-emitting layer stacked in this order from top to bottom.
  • the color light-emitting layer includes a red quantum dot region, a green quantum dot region and a blue quantum dot region, and the backlight
  • the source is located below the lower substrate and provides light to the color luminescent layer such that the color luminescent layer emits red, green and blue light respectively and is permeable from the reflective filter layer, the reflective filter The layer partially reflects the light emitted from the backlight to the reflective filter layer to the color light-emitting layer to re-energize the color light-emitting layer to enhance light efficiency.
  • the present invention provides a reflective filter layer on a color light-emitting layer including a red quantum dot region, a green quantum dot region, and a blue quantum dot region.
  • the reflective filter layer can project the light emitted by the color light-emitting layer, and reflect the light of the partial backlight to the color light-emitting layer to re-energize the color light-emitting layer, thereby improving the light energy utilization rate of the backlight and the luminous efficiency of the color light-emitting layer.
  • the content of quantum dots in the color luminescent layer is reduced under the premise of little or no illuminating effect, thereby reducing the content of cadmium in the quantum dots to meet the standard requirements.
  • FIG. 1 is a schematic structural view of an embodiment of a display device provided by the present invention.
  • FIG. 2 is a schematic structural view of the reflective filter layer of FIG. 1.
  • an embodiment of a display device provided by the present invention includes a display panel 10 and a backlight 20 .
  • the display panel 10 includes an upper substrate 11 and a lower substrate 12 which are disposed opposite each other.
  • the upper substrate 11 and the lower substrate 12 are glass substrates.
  • the upper substrate 11 is provided with a reflective filter layer 111 and a color light-emitting layer 112 which are sequentially stacked from top to bottom.
  • An upper polarizer 113 is further disposed between the color light-emitting layer 112 and the upper substrate 11, and a lower portion of the upper substrate is further disposed.
  • the reflective filter layer 111 is for reflecting light having a wavelength less than or equal to a predetermined wavelength value, and for transmitting light having a wavelength greater than a predetermined wavelength value.
  • the reflective filter layer 111 is a structure designed by an optical thin film principle.
  • the structure includes a high refractive index 1111 and a low refractive index layer 1112, and a high refractive index 1111 and a low refractive index layer 1112 are alternately stacked.
  • the predetermined wavelength value is 400 nm to 430 nm.
  • the rate, h is the optical thickness of the high refractive index layer 1111 and/or the low refractive index layer 1112, which is one quarter of the wavelength of visible light.
  • the material of the high refractive index layer 1111 is polyethylene naphthalate (PEN)
  • the material of the low refractive index layer 1112 is polymethyl methacrylate (PMMA)
  • the wavelength of visible light is 552 nm.
  • the number of layers of the filter layer 111 may be determined according to actual conditions, and is not limited herein.
  • the color luminescent layer 112 includes a red quantum dot region 1121, a green quantum dot region 1122, and a blue quantum dot region 1123.
  • the red quantum dot region 1121, the green quantum dot region 1122, and the blue quantum dot region 1123 can be provided in the backlight 20. Red, green and blue light are emitted under the excitation of light.
  • the red light emitted by the red quantum dot region 1121 has a wavelength of 620 nm to 760 nm
  • the green quantum dot region 1122 emits a green light having a wavelength of 500 nm to 530 nm
  • the blue quantum dot region 1123 emits blue light from the blue quantum dot region 1123.
  • the wavelength is from 430 nm to 470 nm.
  • the material of the quantum dots in the red quantum dot region 1121, the green quantum dot region 1122 and the blue quantum dot region 1123 is a material containing quantum dots, such as cadmium selenide or cadmium sulfide.
  • the lower substrate 12 is provided with a lower electrode 121, a lower polarizer 122 is disposed below, and a liquid crystal 13 is further disposed between the lower substrate and the upper substrate 11.
  • the backlight 20 is located below the lower substrate 12 and supplies light to the color luminescent layer 112 to excite the color luminescent layer 112 to emit light.
  • the backlight 20 is an ultraviolet light source and a short wave blue light source.
  • the wavelength of the light of the ultraviolet light source is 360 nm to 400 nm, and the wavelength of the light of the short-wave blue light source is 375 nm to 430 nm.
  • the reflective filter layer 111 is further provided with a protective layer 115 for protecting the quantum dots in the colored light-emitting layer 112 from the quantum dots by substances such as water or oxygen from the outside.
  • the material of the protective layer is ethylene terephthalate (PET).
  • the upper substrate 11 is further provided with a black matrix 116.
  • the black matrix 116 is located between the red quantum dot region 1121, the green quantum dot region 1122 and the blue quantum dot region 1123.
  • the black matrix 116 It may also be located on the lower substrate 12 or on the upper substrate 11 and the lower substrate 12.
  • the backlight 20 provides light to the color filter layer 112, and the excitation efficiency of the quantum dots in the color filter layer 112 is increased by using an ultraviolet light source or a short-wave blue light source.
  • the reflective filter layer 111 above the color filter layer 112 may be red because the wavelengths of red, green, and blue light are greater than the predetermined wavelength value of the reflective filter layer 111.
  • the light, the green light, and the blue light are transmitted.
  • the light provided by the backlight 20 is emitted to the reflective filter layer 111 through the color filter layer 112, because the wavelength of the light provided by the backlight 20 is less than a predetermined wavelength value.
  • the light is partially reflected to the color filter layer 112, and the reflected light will again excite the color filter layer 112 to emit red, green, and blue light, thereby improving the utilization of the light source, and the color filter layer 112 is re-energized.
  • the luminous efficiency of the light filter layer 112 is increased, and the content of the quantum dots of the color filter layer 112 can be reduced without affecting the light-emitting effect.
  • the ultraviolet light and the short-wave blue light provided by the backlight 20 are Partial reflection color to the light emitting layer 112, reduced the transmission of ultraviolet and short wavelength blue light, thereby protecting the viewer's eyes.
  • the present invention provides a reflective filter layer on a color light-emitting layer including a red quantum dot region, a green quantum dot region, and a blue quantum dot region, the reflective filter layer capable of projecting color illumination.
  • the light emitted by the layer reflects the light of part of the backlight to the color light-emitting layer to re-energize the color light-emitting layer, thereby improving the light energy utilization efficiency of the backlight and the light-emitting efficiency of the color light-emitting layer, thereby having little or no influence.
  • the content of quantum dots in the color luminescent layer is reduced, thereby reducing the content of cadmium in the quantum dots to meet the standard requirements.

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

Abstract

一种显示装置，包括显示面板（10）及背光源（20）；显示面板（10）包括相对设置的上基板（11）及下基板（12），上基板（11）上设有反射式滤光层（111）及彩色发光层（112），反射式滤光层（111）透射彩色发光层（112）发出的红、绿及蓝光并将背光源（20）发射的光线部分反射至彩色发光层（112）以再次激发彩色发光层（112）发光，提高了背光源（20）的光能利用率及彩色发光层（112）的发光效率，在影响较小甚至不影响发光效果的前提下减少彩色发光层（112）中量子点的含量，从而降低量子点中镉元素的含量以符合标准要求。

Description

一种显示装置
【技术领域】
本发明涉及显示技术领域，特别是涉及一种显示装置。
【背景技术】
量子点由于具有发光光谱可调、发光效率高等优点被应用于显示器中，以提升显示器的显示色域，对于量子点而言，可分为含镉材料的量子点和不含镉的量子点，含镉量子点由于比不含镉的量子点发光效率更高，发光光谱更窄，故含镉量子点应用于显示器时的效果更好。
但是由于镉元素是《关于限制在电子电器设备中使用某些有害成分的指令》（ROHS）标准中明确要求限制浓度的元素，因此，在选择含镉量子点应用于显示器中时，需要在不影响显示器显示效果的前提下，降低量子点中镉元素的含量。
【发明内容】
本发明主要提供一种薄膜晶体管及其制备方法，旨在解决如何不影响发光效果的前提下降低量子点含量的问题。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种显示装置，其中，所述显示装置包括显示面板及背光源；其中，所述显示面板包括相对设置的上基板及下基板，所述上基板上设有由上而下依次层叠的反射式滤光层及彩色发光层，所述彩色发光层包括红色量子点区、绿色量子点区及蓝色量子点区，所述背光源位于所述下基板的下方并向所述彩色发光层提供光线，以使得所述彩色发光层分别发出红、绿及蓝光并从所述反射式滤光层透出，所述反射式滤光层将所述背光源发射至所述反射式滤光层的光线部分反射至所述彩色发光层以再次激发所述彩色发光层发光从而提升光效；所述反射式滤光层用于反射波长小于或等于预定波长值的光，同时用于透射波长大于所述预定波长值的光；所述反射式滤光层上还设有保护层，所述保护层用于保护所述彩色发光层而不被侵蚀。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种显示装置，其中，所述显示装置包括显示面板及背光源；其中，所述显示面板包括相对设置的上基板及下基板，所述上基板上设有由上而下依次层叠的反射式滤光层及彩色发光层，所述彩色发光层包括红色量子点区、绿色量子点区及蓝色量子点区，所述背光源位于所述下基板的下方并向所述彩色发光层提供光线，以使得所述彩色发光层分别发出红、绿及蓝光并从所述反射式滤光层透出，所述反射式滤光层将所述背光源发射至所述反射式滤光层的光线部分反射至所述彩色发光层以再次激发所述彩色发光层发光从而提升光效。
本发明的有益效果是：区别于现有技术的情况，本发明通过在包括红色量子点区、绿色量子点区及蓝色量子点区的彩色发光层上设置一层反射式滤光层，该反射式滤光层能够投射彩色发光层发出的光线，而将部分背光源的光反射至彩色发光层以再次激发彩色发光层发光，提高了背光源的光能利用率以及彩色发光层的发光效率，进而在影响较小甚至不影响发光效果的前提下减少彩色发光层中量子点的含量，从而降低量子点中镉元素的含量以符合标准要求。
【附图说明】
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图，其中：
图1是本发明提供的显示装置实施例的结构示意图；
图2是图1中反射式滤光层的结构示意图。
【具体实施方式】
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
参阅图1，本发明提供的显示装置实施例包括显示面板10及背光源20。
显示面板10包括相对设置的上基板11和下基板12。
可选的，上基板11和下基板12为玻璃基板。
上基板11上设有由上而下依次层叠的反射式滤光层111及彩色发光层112，在彩色发光层112与上基板11之间还设有上偏光片113，上基板的下方还设有上电极114。
反射式滤光层111用于反射波长小于或等于预定波长值的光，同时用于透射波长大于预定波长值的光。
参阅图2，反射式滤光层111是采用光学薄膜原理设计而来的结构，该结构包括高折射率1111及低折射率层1112，高折射率1111及低折射率层1112交替层叠设置。
可选的，在本实施例中，预定波长值为400nm~430nm。
其中，高折射率层1111的厚度H=h/λ1，低折射率层1112的厚度L=h/λ2，其中，λ1为高折射率层1111的折射率，λ2为低折射率层1112的折射率，h为高折射率层1111和/或低折射率层1112的光学厚度，该光学厚度为可见光的波长的四分之一。
可选的，高折射率层1111的材料为聚萘二甲酸乙二醇酯(PEN)，低折射率层1112的材料为聚甲基丙烯酸甲酯(PMMA)，可见光的波长为552nm，反射式滤光层111的层数可根据实际情况而定，在此不做限定。
彩色发光层112包括红色量子点区1121、绿色量子点区1122及蓝色量子点区1123，该红色量子点区1121、绿色量子点区1122及蓝色量子点区1123能够在背光源20提供的光线的激发下分别发出红光、绿光及蓝光。
其中，红色量子点区1121发出的红光的波长为620nm~760nm，绿色量子点区1122发出的绿光的波长为500nm~530nm，蓝色量子点区1123蓝色量子点区1123发出的蓝光的波长为430nm~470nm。
其中，红色量子点区1121、绿色量子点区1122及蓝色量子点区1123中的量子点的材料为含隔量子点材料，比如硒化镉或硫化镉。
下基板12上设有下电极121，下方设有下偏光片122，且在下基板与上基板11之间还设有液晶13。
背光源20位于下基板12的下方并向彩色发光层112提供光线以激发彩色发光层112发光。
由于波长较长的光发出的光线对彩色发光层112的激发效率小于波长较短的光发出的光线，因而，在本实施例中，背光源20为紫外线光源及短波蓝光光源。
其中，紫外线光源的光的波长为360nm~400nm，短波蓝光光源的光的波长为375nm~430nm。
进一步的，反射式滤光层111上还设有保护层115，保护层115用于保护彩色发光层112中的量子点不被外界的水或氧气等物质对量子点的侵蚀。
可选的，保护层的材料为对苯二甲酸乙二醇酯（PET）。
进一步的，上基板11上还设有黑色矩阵116，黑色矩阵116位于红色量子点区1121、绿色量子点区1122及蓝色量子点区1123之间，当然，在其他实施例中，黑色矩阵116也可以位于下基板12上，或者位于上基板11及下基板12上。
进一步参阅图1，背光源20向彩色滤光层112提供光线，由于采用紫外线光源或短波蓝光光源而增加了彩色滤光层112中量子点的激发效率，当彩色滤光层112被激发而分别发出红光、绿光及蓝光时，位于彩色滤光层112上方的反射式滤光层111会因为红光、绿光及蓝光的波长均大于反射式滤光层111的预定波长值而使得红光、绿光及蓝光透射而出，此时，背光源20提供的光线会通过彩色滤光层112发射至反射式滤光层111上，由于背光源20提供的光线的波长小于预定波长值而会被部分反射至彩色滤光层112，被反射的光线会再次激发彩色滤光层112分别发出红光、绿光及蓝光，从而提高光源利用率，而且彩色滤光层112由于被再次激发而增加了本身的发光效率，进而可以降低彩色滤光层112量子点的含量且不会影响发光效果，同时，由于背光源20提供的紫外线以及短波蓝光被部分反射至彩色发光层112，降低了透射的紫外线以及短波蓝光，从而保护观看者的眼睛。
区别于现有技术，本发明通过在包括红色量子点区、绿色量子点区及蓝色量子点区的彩色发光层上设置一层反射式滤光层，该反射式滤光层能够投射彩色发光层发出的光线，而将部分背光源的光反射至彩色发光层以再次激发彩色发光层发光，提高了背光源的光能利用率以及彩色发光层的发光效率，进而在影响较小甚至不影响发光效果的前提下减少彩色发光层中量子点的含量，从而降低量子点中镉元素的含量以符合标准要求。
以上所述仅为本发明的实施例，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (18)

  1. 一种显示装置，其中，所述显示装置包括显示面板及背光源；
    其中，所述显示面板包括相对设置的上基板及下基板，所述上基板上设有由上而下依次层叠的反射式滤光层及彩色发光层，所述彩色发光层包括红色量子点区、绿色量子点区及蓝色量子点区，所述背光源位于所述下基板的下方并向所述彩色发光层提供光线，以使得所述彩色发光层分别发出红、绿及蓝光并从所述反射式滤光层透出，所述反射式滤光层将所述背光源发射至所述反射式滤光层的光线部分反射至所述彩色发光层以再次激发所述彩色发光层发光从而提升光效；
    所述反射式滤光层用于反射波长小于或等于预定波长值的光，同时用于透射波长大于所述预定波长值的光；
    所述反射式滤光层上还设有保护层，所述保护层用于保护所述彩色发光层而不被侵蚀。
  2. 根据权利要求1所述的装置，其中，所述预定波长值为400nm~430nm。
  3. 根据权利要求2所述的装置，其中，所述红色量子点区发出的所述红光的波长为620nm~760nm，所述绿色量子点区发出的所述绿光的波长为500nm~530nm，所述蓝色量子点区发出的所述蓝光的波长为430nm~470nm，所述背光源发出的光的波长为360nm~430nm。
  4. 根据权利要求3所述的装置，其中，所述背光源为紫外线光源或短波蓝光光源。
  5. 根据权利要求4所述的装置，其中，所述紫外线光源的光的波长为360nm~400nm，所述短波蓝光光源的光的波长为375nm~430nm。
  6. 根据权利要求1所述的装置，其中，所述反射式滤光层包括高折射率层及低折射率层，所述高折射率层及低折射率层交替层叠设置。
  7. 根据权利要求6所述的装置，其中，所述高折射率层的厚度H=h/λ1，所述低折射率层的厚度L=h/λ2，其中，λ1为所述高折射率层的折射率，λ2为所述低折射率层的折射率，h为所述高折射率层和/或低折射率层的光学厚度，所述光学厚度为可见光的波长的四分之一。
  8. 根据权利要求 1所述的装置，其中，所述上基板还设有黑色矩阵，所述黑色矩阵位于所述红色量子点区、绿色量子点区及蓝色量子点区之间。
  9. 一种显示装置，其中，所述显示装置包括显示面板及背光源；
    其中，所述显示面板包括相对设置的上基板及下基板，所述上基板上设有由上而下依次层叠的反射式滤光层及彩色发光层，所述彩色发光层包括红色量子点区、绿色量子点区及蓝色量子点区，所述背光源位于所述下基板的下方并向所述彩色发光层提供光线，以使得所述彩色发光层分别发出红、绿及蓝光并从所述反射式滤光层透出，所述反射式滤光层将所述背光源发射至所述反射式滤光层的光线部分反射至所述彩色发光层以再次激发所述彩色发光层发光从而提升光效。
  10. 根据权利要求9所述的装置，其中，所述反射式滤光层用于反射波长小于或等于预定波长值的光，同时用于透射波长大于所述预定波长值的光。
  11. 根据权利要求10所述的装置，其中，所述预定波长值为400nm~430nm。
  12. 根据权利要求11所述的装置，其中，所述红色量子点区发出的所述红光的波长为620nm~760nm，所述绿色量子点区发出的所述绿光的波长为500nm~530nm，所述蓝色量子点区发出的所述蓝光的波长为430nm~470nm，所述背光源发出的光的波长为360nm~430nm。
  13. 根据权利要求12所述的装置，其中，所述背光源为紫外线光源或短波蓝光光源。
  14. 根据权利要求13所述的装置，其中，所述紫外线光源的光的波长为360nm~400nm，所述短波蓝光光源的光的波长为375nm~430nm。
  15. 根据权利要求10所述的装置，其中，所述反射式滤光层包括高折射率层及低折射率层，所述高折射率层及低折射率层交替层叠设置。
  16. 根据权利要求15所述的装置，其中，所述高折射率层的厚度H=h/λ1，所述低折射率层的厚度L=h/λ2，其中，λ1为所述高折射率层的折射率，λ2为所述低折射率层的折射率，h为所述高折射率层和/或低折射率层的光学厚度，所述光学厚度为可见光的波长的四分之一。
  17. 根据权利要求 9所述的装置，其中，所述反射式滤光层上还设有保护层，所述保护层用于保护所述彩色发光层而不被侵蚀。
  18. 根据权利要求 9所述的装置，其中，所述上基板还设有黑色矩阵，所述黑色矩阵位于所述红色量子点区、绿色量子点区及蓝色量子点区之间。
PCT/CN2017/080412 2017-03-14 2017-04-13 一种显示装置 WO2018166025A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/520,388 US20180299727A1 (en) 2017-03-14 2017-04-13 Display devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201710149678.X 2017-03-14
CN201710149678.XA CN106681055A (zh) 2017-03-14 2017-03-14 一种显示装置

Publications (1)

Publication Number Publication Date
WO2018166025A1 true WO2018166025A1 (zh) 2018-09-20

Family

ID=58828870

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/080412 WO2018166025A1 (zh) 2017-03-14 2017-04-13 一种显示装置

Country Status (3)

Country Link
US (1) US20180299727A1 (zh)
CN (1) CN106681055A (zh)
WO (1) WO2018166025A1 (zh)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102378083B1 (ko) * 2017-05-24 2022-03-25 삼성디스플레이 주식회사 표시 장치
CN106950632A (zh) * 2017-05-26 2017-07-14 深圳市国显科技有限公司 一种量子点滤蓝光膜及其显示器
CN109212813B (zh) * 2017-06-30 2020-12-25 京东方科技集团股份有限公司 彩膜基板、显示装置
CN107526214A (zh) * 2017-08-21 2017-12-29 深圳市华星光电技术有限公司 荧光粉薄膜组件及其制作方法、背光模组
CN107505767A (zh) * 2017-10-16 2017-12-22 京东方科技集团股份有限公司 光转换结构、背光模组、彩膜基板以及显示装置
CN107894677A (zh) * 2017-12-28 2018-04-10 惠州市华星光电技术有限公司 用于背光模块的量子点膜、背光模块及液晶显示器
CN110828686A (zh) * 2018-08-10 2020-02-21 咸阳彩虹光电科技有限公司 一种自发光显示结构及显示装置
CN108957860A (zh) * 2018-08-22 2018-12-07 京东方科技集团股份有限公司 显示装置及其制备方法
KR102551221B1 (ko) 2018-09-03 2023-07-04 삼성디스플레이 주식회사 광학 부재 및 이를 포함하는 표시 장치
CN109471291A (zh) * 2018-11-08 2019-03-15 惠科股份有限公司 一种显示装置及其制造方法
CN109686240B (zh) * 2019-01-04 2021-03-12 京东方科技集团股份有限公司 一种直下式背光模组以及显示装置
CN110221477B (zh) * 2019-05-30 2021-02-09 华为技术有限公司 阵列基板、液晶显示屏、终端
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
JP7339844B2 (ja) * 2019-10-21 2023-09-06 シャープ株式会社 バックライト装置および液晶表示装置
CN113451363A (zh) * 2020-03-27 2021-09-28 咸阳彩虹光电科技有限公司 一种oled显示面板、显示装置
CN113492607B (zh) * 2020-04-08 2023-06-16 陈学仕 喷墨印刷封装型量子点制造方法、光转换单元及显示面板
CN112684632A (zh) * 2020-12-25 2021-04-20 舟山扑浪实业有限公司 一种像素级量子点显示面板及其制备方法
CN114578616A (zh) 2022-02-14 2022-06-03 惠州华星光电显示有限公司 背光模组及显示装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1127670C (zh) * 1998-03-27 2003-11-12 皇家菲利浦电子有限公司 背光系统和包含该系统的显示装置
CN102437275A (zh) * 2011-12-27 2012-05-02 杭州浙大三色仪器有限公司 一种半导体发光器件
KR20120055360A (ko) * 2010-11-23 2012-05-31 엘지디스플레이 주식회사 액정표시장치 및 그 제조 장비
CN103278876A (zh) * 2013-05-28 2013-09-04 京东方科技集团股份有限公司 量子点彩色滤光片及其制作方法、显示装置
CN105093617A (zh) * 2015-08-05 2015-11-25 深圳市华星光电技术有限公司 一种液晶显示面板及其制造方法

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101614908B (zh) * 2008-06-24 2011-09-28 鸿富锦精密工业（深圳）有限公司 液晶显示屏
US8921872B2 (en) * 2011-12-09 2014-12-30 Sony Corporation Display unit and method of manufacturing the same, electronic apparatus, illumination unit, and light-emitting device and method of manufacturing the same
US9423083B2 (en) * 2013-03-07 2016-08-23 Pacific Light Technologies, Corp. Multiple quantum dot (QD) device
CN103235356B (zh) * 2013-04-16 2016-06-29 京东方科技集团股份有限公司 滤光片及其制备方法、彩膜基板和显示装置
CN104617197B (zh) * 2015-01-08 2017-08-01 青岛海信电器股份有限公司 一种显示模组用led发光器件及显示模组
CN105093662B (zh) * 2015-09-11 2018-07-06 深圳市华星光电技术有限公司 滤光片及背光模组
CN105223724B (zh) * 2015-10-08 2018-04-27 深圳市华星光电技术有限公司 量子点液晶显示装置
CN105204103B (zh) * 2015-10-09 2018-11-23 深圳市华星光电技术有限公司 量子点彩色滤光片及液晶显示装置
CN105259699B (zh) * 2015-11-27 2018-09-11 武汉华星光电技术有限公司 液晶显示器及其显示方法
CN105785649A (zh) * 2016-05-09 2016-07-20 武汉华星光电技术有限公司 量子点背光模组
CN105867024A (zh) * 2016-05-24 2016-08-17 深圳市华星光电技术有限公司 一种背光模组以及液晶显示装置
CN106125403A (zh) * 2016-09-05 2016-11-16 深圳市华星光电技术有限公司 一种背光模组及液晶显示器

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1127670C (zh) * 1998-03-27 2003-11-12 皇家菲利浦电子有限公司 背光系统和包含该系统的显示装置
KR20120055360A (ko) * 2010-11-23 2012-05-31 엘지디스플레이 주식회사 액정표시장치 및 그 제조 장비
CN102437275A (zh) * 2011-12-27 2012-05-02 杭州浙大三色仪器有限公司 一种半导体发光器件
CN103278876A (zh) * 2013-05-28 2013-09-04 京东方科技集团股份有限公司 量子点彩色滤光片及其制作方法、显示装置
CN105093617A (zh) * 2015-08-05 2015-11-25 深圳市华星光电技术有限公司 一种液晶显示面板及其制造方法

Also Published As

Publication number Publication date
CN106681055A (zh) 2017-05-17
US20180299727A1 (en) 2018-10-18

Similar Documents

Publication Publication Date Title
WO2018166025A1 (zh) 一种显示装置
JP6086175B1 (ja) ガラス板、導光板ユニット、面状発光装置、および、液晶表示装置
JP5717949B2 (ja) 光学部材および表示装置
WO2016086416A1 (zh) 一种量子点背光模组以及显示装置
WO2014117400A1 (zh) 背光模组及液晶显示装置
CN105204221B (zh) 彩膜基板、显示面板及显示装置
US9841628B2 (en) Liquid crystal display device and electronic equipment
WO2017024600A1 (zh) 液晶显示器及其液晶显示模组
CN104635380B (zh) 具有量子条的背光模组以及液晶显示装置
WO2017088220A1 (zh) 液晶显示器及其显示方法
WO2017173700A1 (zh) 背光模组及液晶显示装置
CN209325530U (zh) 一种新型面板灯
CN106908985A (zh) 一种显示装置
CN105182612A (zh) 用于背光模组的光源组件、背光模组以及液晶显示器
CN102810288B (zh) 背光组件和包括该背光组件的显示装置
WO2017177488A1 (zh) 双面液晶显示装置及其背光模组
CN108123055A (zh) 发光装置
WO2019227648A1 (zh) 液晶显示面板及液晶显示装置
CN109690183A (zh) 色转换导光板和包含其的装置
CN108681149A (zh) 量子点背光模组的量子点保护方法
TWI410167B (zh) 前光板
TWI397748B (zh) 背光模組
CN203275836U (zh) 显示装置
CN110277509A (zh) 一种显示面板和显示装置
CN106773322A (zh) 背光模组及双面液晶显示器

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 15520388

Country of ref document: US

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

Ref document number: 17900935

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: 17900935

Country of ref document: EP

Kind code of ref document: A1