WO2019227669A1 - 显示面板及显示装置 - Google Patents

显示面板及显示装置 Download PDF

Info

Publication number
WO2019227669A1
WO2019227669A1 PCT/CN2018/099398 CN2018099398W WO2019227669A1 WO 2019227669 A1 WO2019227669 A1 WO 2019227669A1 CN 2018099398 W CN2018099398 W CN 2018099398W WO 2019227669 A1 WO2019227669 A1 WO 2019227669A1
Authority
WO
WIPO (PCT)
Prior art keywords
display unit
scattered
display
layer
region
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/CN2018/099398
Other languages
English (en)
French (fr)
Inventor
余文静
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 Semiconductor Display Technology Co Ltd
Original Assignee
Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
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 Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd filed Critical Wuhan China Star Optoelectronics Semiconductor Display Technology Co Ltd
Priority to US16/086,457 priority Critical patent/US11171312B2/en
Publication of WO2019227669A1 publication Critical patent/WO2019227669A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/38—Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/84—Passivation; Containers; Encapsulations
    • H10K50/844—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/85—Arrangements for extracting light from the devices
    • H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30—Devices specially adapted for multicolour light emission
    • H10K59/35—Devices specially adapted for multicolour light emission comprising red-green-blue [RGB] subpixels
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/873—Encapsulations
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/875—Arrangements for extracting light from the devices
    • H10K59/879—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133509—Filters, e.g. light shielding masks
    • G02F1/133512—Light shielding layers, e.g. black matrix
    • 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
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element

Definitions

  • the present invention relates to the field of flat panel displays, and in particular, to a display panel and a display device.
  • OLED Organic Light-Emitting Diode
  • LCD Liquid Crystal Displays
  • OLEDs have the advantages of more power saving, thinner, and wider viewing angles, which LCDs cannot match.
  • people are increasingly demanding the fineness of display, that is, the resolution, but the production of high-quality, high-resolution OLED displays still faces many challenges.
  • the screen When the display panel is used outdoors, the screen reflects sunlight very strongly, resulting in a display panel with low contrast when used outdoors.
  • a layer of polarizer (Polarizer, POL) is usually attached above the screen; however, while the polarizer of this method absorbs external sunlight, it also absorbs the light emitted by the OLED About 55%, so it is difficult to improve the luminous efficiency of OLED.
  • the present invention proposes the following technical solutions based on the above technical problems.
  • the present invention provides a display panel and a display device to solve the technical problem of low light emission efficiency of the existing display panel.
  • the present invention provides a display panel, wherein the display panel includes:
  • a color filter substrate is formed on the dispersive layer, and the color filter substrate includes a color filter unit corresponding to the display unit in a one-to-one relationship, and a light-shielding layer disposed at a gap between the color filter units. ;
  • a cover plate is formed on the color filter substrate.
  • the scattered region includes a first scattered region, a second scattered region, and a third scattered region, the first scattered region, the second scattered region, and the third scattered region.
  • the refractive indices of the third scattered-color regions are different.
  • the first scattered region includes a plurality of first regions having the same area, each of the first regions corresponds to a display unit, and a display unit is An orthographic projection on a layer is located within the first region;
  • the second scattered region includes a plurality of second regions having the same area, each of the second regions corresponds to a display unit, and an orthographic projection of the display unit on the scattered layer is located in the In the second area;
  • the third scattered region includes a plurality of third regions having the same area, each of the third regions corresponds to a display unit, and an orthographic projection of the display unit on the scattered layer is located in the Within the third area.
  • the shape of the display unit is a polygon or a circle.
  • the minimum refractive index of the dispersive layer is not less than that of the color filter substrate and the thin film encapsulation layer.
  • the non-scattering region is made of a black light-shielding material.
  • each of the color filter units and the corresponding display unit display the same color.
  • each of the display units is one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
  • the display unit includes a first display unit, a second display unit, and a third display unit;
  • the first display unit, the second display unit, and the third display unit are one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the first display unit, the second display unit, The sub-pixel colors of the display unit and the third display unit are different.
  • the present invention also provides a display device, wherein the display device includes the display panel described above.
  • the invention also provides a display panel, which includes:
  • a dispersive layer is formed on the thin film encapsulation layer, the dispersive layer includes a dispersive region and a non-dispersive region, and the dispersive region and the dispersive region are arranged alternately,
  • the scattered region includes a first scattered region, a second scattered region, and a third scattered region
  • a color filter substrate is formed on the dispersive layer, and the color filter substrate includes a color filter unit corresponding to the display unit in a one-to-one relationship, and a light-shielding layer disposed at a gap between the color filter units. ;
  • a cover plate is formed on the color filter substrate.
  • the first scattered region includes a plurality of first regions having the same area, each of the first regions corresponds to a display unit, and a display unit is An orthographic projection on a layer is located within the first region;
  • the second scattered region includes a plurality of second regions having the same area, each of the second regions corresponds to a display unit, and an orthographic projection of the display unit on the scattered layer is located in the In the second area;
  • the third scattered region includes a plurality of third regions having the same area, each of the third regions corresponds to a display unit, and an orthographic projection of the display unit on the scattered layer is located in the Within the third area.
  • the shape of the display unit is a polygon or a circle.
  • the minimum refractive index of the dispersive layer is not less than that of the color filter substrate and the thin film encapsulation layer.
  • the non-scattering region is made of a black light-shielding material.
  • each of the color filter units and the corresponding display unit display the same color.
  • each of the display units is one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel.
  • the display unit includes a first display unit, a second display unit, and a third display unit;
  • the first display unit, the second display unit, and the third display unit are one of a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and the first display unit, the second display unit, The sub-pixel colors of the display unit and the third display unit are different.
  • a dispersive layer is provided between a thin film encapsulation layer of the display panel and the color filter substrate.
  • the dispersive layer includes a dispersive area and a non-dispersive area.
  • the dispersive area is composed of several different The area of the refractive index is formed so that external light is absorbed by the light-shielding layer on the color filter substrate through the dispersive layer, which improves the light emitting efficiency of the display unit, that is, the contrast of the display panel.
  • FIG. 1 is a structural diagram of a film layer of a display panel according to a preferred embodiment of the present invention.
  • FIG. 1 shows a film structure diagram of a display panel according to the present invention.
  • the display panel includes:
  • the substrate 10 may be one of a glass substrate, a quartz substrate, and a resin substrate.
  • a display unit is formed on the substrate 10.
  • the display unit includes a first display unit 201, a second display unit 202, and a third display unit 203.
  • each of the display units is a red sub-pixel, One of a green sub-pixel and a blue sub-pixel; that is, the first display unit 201, the second display unit 202, and the third display unit 203 are a red sub-pixel, a green sub-pixel, and a blue sub-pixel
  • One of the first display units 201, the second display unit 202, and the third display unit 203 have different sub-pixel colors.
  • an OLED film layer 30 is further included between the display unit and the substrate 10.
  • the OLED film layer 30 includes an anode layer, a pixel definition layer, a first common layer, a light emitting layer, a second common layer, and a cathode layer. ;
  • the light-emitting layer is an organic semiconductor, which has a special band structure. Electrons generated by the cathode and holes generated by the anode meet in the light-emitting layer, and then emit photons of a certain wavelength, and these photons enter our eyes. It is the color we see. As the light source of the display panel, different colors of sub-pixels are used to generate different colors of light.
  • a thin film encapsulation layer 40 is formed on the display unit.
  • the thin film encapsulation layer 40 mainly plays a role of blocking water and oxygen, and prevents external water vapor from eroding the organic light emitting layer.
  • the thin film encapsulation layer 40 is mainly composed of an organic encapsulation layer and
  • the inorganic encapsulation layers are formed by staggering and stacking; usually an organic encapsulation layer is located in the middle of the thin film encapsulation layer 40, and an inorganic encapsulation layer is located on both sides of the thin film encapsulation layer 40, and the organic encapsulation layer is wrapped in the middle;
  • the organic encapsulation layer is very flexible, its ability to block water and oxygen is very limited, while the dense and pinhole-free inorganic encapsulation layer has high ability to block water and oxygen, but it is difficult to produce a dense and high-quality film when it reaches a certain thickness.
  • Layer, thin film performance is a rigid structure and fragile. Therefore, most of the current international flexible packaging materials are based on organic or inorganic multilayer film alternating composite structure packaging structure.
  • a dispersion layer 50 is formed on the thin film encapsulation layer 40.
  • the dispersion layer 50 includes a dispersion region and a non-dispersion region 502, and the dispersion region and the dispersion region are arranged alternately;
  • the chromatic dispersion region includes a first chromatic dispersion region 5011, a second chromatic dispersion region 5012, and a third chromatic dispersion region 5013.
  • the first chromatic dispersion region, the second chromatic dispersion region, and the third chromatic dispersion region. Have different refractive indices;
  • the first scattered region includes a plurality of first regions having the same area, each of the first regions corresponds to a display unit, and a display unit is
  • the orthographic projection on layer 50 is located in the first region;
  • the second scattered region includes a plurality of second regions having the same area, each of the second regions corresponding to one of the display units and one of the display
  • the orthographic projection of the unit on the dispersive layer 50 is located in the second region;
  • the third dispersive region includes a plurality of third regions having the same area, each of the third region and a display unit
  • an orthographic projection of the display unit on the dispersive layer 50 is located in the third region; preferably, in this embodiment, the shape of the display unit is a polygon or a circle.
  • the non-scattering region may be a light-shielding layer, that is, made of a black light-shielding material, or may be composed of other organic substances capable of alleviating stress.
  • the minimum refractive index of the dispersive layer 50 is not less than the refractive index of the color filter substrate and the thin film encapsulation layer; that is, light is irradiated from the light dense medium to the photophobic medium, so that the light is irradiated to the thin film encapsulation layer. As much of the light as possible is totally reflected and enters the black matrix of the color filter substrate, but the total light reflection from the sparse medium to the light dense medium does not occur.
  • the refractive index relationship between the film structures The invention is not limited to this solution.
  • the present invention mainly adds a dispersion layer 60 on the POL-Less structure.
  • the POL-Less structure is to place the CF (color filter, color filter substrate) corresponding to the color on the R, G, and B pixels of the OLED, respectively.
  • BM black matrix
  • BM black matrix
  • a scattering layer 60 is plated in the middle area of CF and TFE (Thin Film Encapsulation, thin film encapsulation), and the external light transmitted by CF is absorbed by the BM after being refracted and reflected by the scattering layer 60; existing This method in the technology has certain limitations, that is, because of the refractive index problem, external light may pass through CF after being refracted and reflected by the dispersive layer;
  • the dispersive layers with different refractive index regions are provided so that external light is absorbed by the light-shielding layer on the color filter substrate through the dispersive layer, thereby improving the luminous efficiency of the display unit, that is, improving the display panel. Contrast.
  • a color filter substrate 60 is formed on the dispersion layer 50.
  • the color filter substrate 60 includes a base substrate (not shown), a color filter layer, and a light shielding layer 602.
  • the base substrate is the same material as the substrate 10 in this embodiment, and is a substrate of the same type.
  • the color filter layer includes a plurality of color filter units, that is, a first color filter unit 6011 and a second color filter.
  • Each of the color filter units corresponds to one of the display units, and each of the color filter units is one of a red color block, a green color block, and a blue color block, and each of the color filters
  • the light unit displays the same color as the corresponding display unit; that is, when the first display unit 201 is a red sub-pixel, the second display unit 202 is a green sub-pixel, and the third display unit 203 is a red sub-pixel, the corresponding
  • the first color filter unit 6011 is a red color block
  • the second color filter unit 6012 is a green color block
  • the third color filter unit 6012 is a blue color block.
  • the light shielding layer 602 is disposed at a gap between the color filter units, and the light shielding layer 602 is made of a black light shielding material.
  • the external environment is absorbed by the light-shielding layer 602 by changing the refractive index of the material;
  • the wavelengths of the light that is, the red, green, and blue light rays are different, because when the scattered area is set, the scattered area corresponding to the refractive index is set according to the sub-pixel of the corresponding color.
  • a cover plate (not shown) is formed on the color filter substrate 60, and the cover plate is used to protect each film layer structure of the display panel.
  • the present invention also provides a display device.
  • the display device has the above display panel.
  • the invention provides a display panel and a display device.
  • the display panel includes a substrate, a display unit, a thin film encapsulation layer, a dispersive layer, a color filter substrate, and a cover plate.
  • the dispersive layer includes a dispersive area and a non-dispersive color. Area, the scattered area is composed of a plurality of areas with different refractive indexes; the present invention allows external light to pass through the scattered layer and the light-shielding layer on the color filter substrate by setting the scattered layers of different refractive index areas Absorption improves the luminous efficiency of the display unit, that is, improves the contrast of the display panel.

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)
  • Optical Filters (AREA)

Abstract

本发明提出了一种显示面板及显示装置，所述显示面板包括基板、显示单元、薄膜封装层、散色层、彩膜基板以及盖板，所述散色层包括散色区域和非散色区域，所述散色区域由若干个不同的折射率的区域构成。

Description

显示面板及显示装置 技术领域
本发明涉及平板显示领域，特别涉及一种显示面板及显示装置。
 背景技术
在平板显示技术中，有机发光二极管（Organic Light-Emitting Diode，OLED）显示器具有轻薄、主动发光、响应速度快、可视角大、色域宽、亮度高和功耗低等众多优点，逐渐成为继液晶显示器后的第三代显示技术。相对于LCD（Liquid crystal displays，液晶显示器），OLED具有更省电，更薄，且视角宽的优势，这是LCD无法比拟的。目前，人们对显示的细腻程度即分辨率要求越来越高，但生产高质量、高分辨率的OLED显示屏仍然面临着许多挑战。
显示面板在室外使用时，屏幕对太阳光的反射很强烈，导致显示面板在室外使用时对比度很低。现有技术中，为了提升设备的对比度，通常在屏幕上方贴附一层偏光片(Polarizer，POL)；但是此方法的偏光片在吸收外界太阳光的同时，也将OLED所发出的光吸收了55%左右，因此想要提升OLED的发光效率比较困难。
因此，本发明基于上述技术问题提出了下列技术方案。
 技术问题
本发明提供一种显示面板及显示装置，以解决现有显示面板发光效率低的技术问题。
 技术解决方案
本发明提供一种显示面板，其中，所述显示面板包括：
基板；
显示单元，形成于所述基板上；
薄膜封装层，形成于所述显示单元上；
以及
散色层，形成于所述薄膜封装层上，所述散色层包括散色区域和非散色区域，所述散色区域和所述散色区域相间排列；
彩膜基板，形成于所述散色层上，所述彩膜基板包括与所述显示单元一一对应的彩色滤光单元、以及设置于各所述彩色滤光单元之间间隙处的遮光层；
盖板，形成于所述彩膜基板上。
根据本发明一优选实施例，所述散色区域包括第一散色区域、第二散色区域以及第三散色区域，所述第一散色区域、所述第二散色区域以及所述第三散色区域的折射率各不相同。
根据本发明一优选实施例，所述第一散色区域包括多个面积相等的第一区域，每一所述第一区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第一区域内；
所述第二散色区域包括多个面积相等的第二区域，每一所述第二区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第二区域内；
所述第三散色区域包括多个面积相等的第三区域，每一所述第三区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第三区域内。
根据本发明一优选实施例，所述显示单元的形状为多边形或圆形。
根据本发明一优选实施例，所述散色层的最小折射率不小于所述彩膜基板以及所述薄膜封装层的折射率。
根据本发明一优选实施例，所述非散色区域由黑色遮光材料制成。
根据本发明一优选实施例，每一所述彩色滤光单元与对应的所述显示单元显示的颜色相同。
根据本发明一优选实施例，每一所述显示单元为红色子像素、绿色子像素、蓝色子像素中的一种。
根据本发明一优选实施例，所述显示单元包括第一显示单元、第二显示单元以及第三显示单元；
所述第一显示单元、所述第二显示单元以及所述第三显示单元为红色子像素、绿色子像素、蓝色子像素中的一种，且所述第一显示单元、所述第二显示单元以及所述第三显示单元的子像素颜色各不相同。
本发明还提出了一种显示装置，其特征在于，所述显示装置包括上述显示面板。
本发明还提出了一种显示面板，其包括：
基板；
显示单元，形成于所述基板上；
薄膜封装层，形成于所述显示单元上；
以及
散色层，形成于所述薄膜封装层上，所述散色层包括散色区域和非散色区域，所述散色区域和所述散色区域相间排列，
其中，所述散色区域包括第一散色区域、第二散色区域以及第三散色区域；
彩膜基板，形成于所述散色层上，所述彩膜基板包括与所述显示单元一一对应的彩色滤光单元、以及设置于各所述彩色滤光单元之间间隙处的遮光层；
盖板，形成于所述彩膜基板上。
根据本发明一优选实施例，所述第一散色区域包括多个面积相等的第一区域，每一所述第一区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第一区域内；
所述第二散色区域包括多个面积相等的第二区域，每一所述第二区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第二区域内；
所述第三散色区域包括多个面积相等的第三区域，每一所述第三区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第三区域内。
根据本发明一优选实施例，所述显示单元的形状为多边形或圆形。
根据本发明一优选实施例，所述散色层的最小折射率不小于所述彩膜基板以及所述薄膜封装层的折射率。
根据本发明一优选实施例，所述非散色区域由黑色遮光材料制成。
根据本发明一优选实施例，每一所述彩色滤光单元与对应的所述显示单元显示的颜色相同。
根据本发明一优选实施例，每一所述显示单元为红色子像素、绿色子像素、蓝色子像素中的一种。
根据本发明一优选实施例，所述显示单元包括第一显示单元、第二显示单元以及第三显示单元；
所述第一显示单元、所述第二显示单元以及所述第三显示单元为红色子像素、绿色子像素、蓝色子像素中的一种，且所述第一显示单元、所述第二显示单元以及所述第三显示单元的子像素颜色各不相同。
 有益效果
本发明通过在所述显示面板的薄膜封装层和所述彩膜基板之间设置散色层，所述散色层包括散色区域和非散色区域，所述散色区域由若干个不同的折射率的区域构成，使得外界光经过散色层被所述彩膜基板上的遮光层吸收，提高了显示单元的发光效率，即提高了显示面板的对比度。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，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。
图1为本发明优选实施例一种显示面板的膜层结构图。
 本发明的最佳实施方式
以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是用以相同标号表示。
图1所示为本发明一种显示面板的膜层结构图，其中，所述显示面板包括：
基板10，所述基板10的原材料可以为玻璃基板、石英基板、树脂基板等中的一种。
显示单元，形成于所述基板10上，所述显示单元包括第一显示单元201、第二显示单元202以及第三显示单元203；本实施例中，每一所述显示单元为红色子像素、绿色子像素、蓝色子像素中的一种；即所述第一显示单元201、所述第二显示单元202以及所述第三显示单元203为红色子像素、绿色子像素、蓝色子像素中的一种，且所述第一显示单元201、所述第二显示单元202以及所述第三显示单元203的子像素颜色各不相同。
另外，在所述显示单元和所述基板10之间还包括OLED膜层30，所述OLED膜层30包括阳极层、像素定义层、第一公共层、发光层、第二公共层、阴极层；
其中，所述发光层为有机物半导体，其具有特殊的能带结构，所述阴极产生的电子与阳极产生的空穴在发光层中相遇，再散发出来一定波长的光子，而这些光子进入我们眼睛就是我们看到的色彩，作为所述显示面板的光源，通过不同颜色的子像素，产生不同颜色的光。
薄膜封装层40，形成于所述显示单元上，所述薄膜封装层40主要起阻水阻氧的作用，防止外部水汽对有机发光层的侵蚀，所述薄膜封装层40主要由有机封装层与无机封装层交错层叠而成；通常有机封装层位于所述薄膜封装层40的中间，无机封装层位于所述薄膜封装层40的两侧，将有机封装层包裹在中间；
所述有机封装层虽然柔性很好，但阻挡水氧渗透能力非常有限，而致密无针孔的无机封装层阻挡水氧能力虽较高，但达到一定厚度时很难制备出致密高质量的膜层，薄膜性能表现为刚性结构且易碎裂，因此，目前国际上绝大多数的柔性封装材料都是基于有机或无机多层膜交替复合结构的封装结构。
散色层50，形成于所述薄膜封装层40上，所述散色层50包括散色区域和非散色区域502，所述散色区域和所述散色区域相间排列；
所述散色区域包括第一散色区域5011、第二散色区域5012以及第三散色区域5013，所述第一散色区域、所述第二散色区域以及所述第三散色区域的折射率各不相同；
根据本发明一优选实施例，所述第一散色区域包括多个面积相等的第一区域，每一所述第一区域与一所述显示单元对应，一所述显示单元在所述散色层50上的正投影位于所述第一区域内；所述第二散色区域包括多个面积相等的第二区域，每一所述第二区域与一所述显示单元对应，一所述显示单元在所述散色层50上的正投影位于所述第二区域内；所述第三散色区域包括多个面积相等的第三区域，每一所述第三区域与一所述显示单元对应，一所述显示单元在所述散色层50上的正投影位于所述第三区域内；优选的，本实施例中，所述显示单元的形状为多边形或圆形。
另外，所述非散色区域可以为遮光层，即由黑色遮光材料制成，或者为其他可以缓解应力的有机物构成。
本实施例中，所述散色层50的最小折射率不小于所述彩膜基板以及所述薄膜封装层的折射率；即光由光密介质照射到光疏介质，使得照射到薄膜封装层的光线尽可能多的发生全反射，并进入到彩膜基板的黑色矩阵中，而光疏介质到光密介质则不会发生全反射；另外，关于各膜层结构之间的折射率关系，本发明不限于此方案。
本发明主要在POL-Less结构上增加散色层60，POL-Less结构即在OLED的R、G、B像素的上方分别放置其颜色所对应的CF（color filter，彩膜基板），而在任意两个CF之间填充BM（black matrix，黑色矩阵）；即OLED所发出的光能通过CF传输出去，而外界太阳光在照射到设备表面时，发光区域只有CF所对应颜色的光能透过，非发光区域的太阳光能被BM所吸收；
其次，在CF和TFE（Thin Film Encapsulation，薄膜封装层）的中间区域镀一散色层60，由CF透过的外界光经过散色层60的折射和反射作用后被BM所吸收；现有技术中的此种方法具有一定的局限性，即因为折射率的问题，外界光经过散色层的折射和反射作用后，有可能再由CF穿透出去；
因此，本发明通过设置不同折射率区域的所述散色层，使外界光经过散色层被所述彩膜基板上的遮光层吸收，提高了显示单元的发光效率，即提高了显示面板的对比度。
彩膜基板60，形成于所述散色层50上，所述彩膜基板60包括衬底基板（未画出）、彩色滤光层以及遮光层602；
所述衬底基板与本实施例中的基板10材质相同，为同种类型的基板；所述彩色滤光层包括多个彩色滤光单元，即第一彩色滤光单元6011、第二彩色滤光单元6012以及第三彩色滤光单元6013，所述第一彩色滤光单元6011与所述第一显示单元201对应，所述第二彩色滤光单元6012与第二显示单元202对应，所述第三彩色滤光单元6013与所述第三显示单元203对应；
每一所述彩色滤光单元与一所述显示单元对应，每一所述彩色滤光单元为红色色阻块、绿色色阻块以及蓝色色阻块中的一种，每一所述彩色滤光单元与对应的所述显示单元显示的颜色相同；即当第一显示单元201为红色子像素，第二显示单元202为绿色子像素，第三显示单元203为红色子像素时，与其对应的第一彩色滤光单元6011为红色色组块、第二彩色滤光单元6012为绿色色组块，第三彩色滤光单元6012为蓝色色组块。
所述遮光层602设置于各所述彩色滤光单元之间的间隙处，所述遮光层602由黑色遮光材料构成。
本实施例中，当外界光通过不同的所述彩色滤光单元进入散色层50时，通过改变材料的折射率使得外界被遮光层602吸收掉；而通过不同的彩色滤光单元的的外界光，即红绿蓝三色光线的波长不相同，因为在设置散色区域时，根据所对应的颜色的子像素设置对应折射率的散色区域。
盖板（未画出），形成于所述彩膜基板60上，所述盖板用于保护所述显示面板的各膜层结构。
本发明还提出了一种显示装置，所述显示装置上述显示面板。
本发明提出了一种显示面板及显示装置，所述显示面板包括基板、显示单元、薄膜封装层、散色层、彩膜基板以及盖板，所述散色层包括散色区域和非散色区域，所述散色区域由若干个不同的折射率的区域构成；本发明通过设置不同折射率区域的所述散色层，使外界光经过散色层被所述彩膜基板上的遮光层吸收，提高了显示单元的发光效率，即提高了显示面板的对比度。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (17)

  1. 一种显示面板，其包括：
    基板；
    显示单元，形成于所述基板上；
    薄膜封装层，形成于所述显示单元上；
    以及
    散色层，形成于所述薄膜封装层上，所述散色层包括散色区域和非散色区域，所述散色区域和所述散色区域相间排列，
    其中，所述散色区域包括第一散色区域、第二散色区域以及第三散色区域，所述第一散色区域、所述第二散色区域以及所述第三散色区域的折射率各不相同；
    彩膜基板，形成于所述散色层上，所述彩膜基板包括与所述显示单元一一对应的彩色滤光单元、以及设置于各所述彩色滤光单元之间间隙处的遮光层；
    盖板，形成于所述彩膜基板上。
  2. 根据权利要求1所述的显示面板，其中，所述第一散色区域包括多个面积相等的第一区域，每一所述第一区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第一区域内；
    所述第二散色区域包括多个面积相等的第二区域，每一所述第二区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第二区域内；
    所述第三散色区域包括多个面积相等的第三区域，每一所述第三区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第三区域内。
  3. 根据权利要求2所述的显示面板，其中，所述显示单元的形状为多边形或圆形。
  4. 根据权利要求1所述的显示面板，其中，所述散色层的最小折射率不小于所述彩膜基板以及所述薄膜封装层的折射率。
  5. 根据权利要求1所述的显示面板，其中，所述非散色区域由黑色遮光材料制成。
  6. 根据权利要求1所述的显示面板，其中，每一所述彩色滤光单元与对应的所述显示单元显示的颜色相同。
  7. 根据权利要求1所述的显示面板，其中，每一所述显示单元为红色子像素、绿色子像素、蓝色子像素中的一种。
  8. 根据权利要求7所述的显示面板，其中，所述显示单元包括第一显示单元、第二显示单元以及第三显示单元；
    所述第一显示单元、所述第二显示单元以及所述第三显示单元为红色子像素、绿色子像素、蓝色子像素中的一种，且所述第一显示单元、所述第二显示单元以及所述第三显示单元的子像素颜色各不相同。
  9. 一种显示装置，其特征在于，所述显示装置包括根据权利要求1所述的显示面板。
  10. 一种显示面板，其包括：
    基板；
    显示单元，形成于所述基板上；
    薄膜封装层，形成于所述显示单元上；
    以及
    散色层，形成于所述薄膜封装层上，所述散色层包括散色区域和非散色区域，所述散色区域和所述散色区域相间排列，
    其中，所述散色区域包括第一散色区域、第二散色区域以及第三散色区域；
    彩膜基板，形成于所述散色层上，所述彩膜基板包括与所述显示单元一一对应的彩色滤光单元、以及设置于各所述彩色滤光单元之间间隙处的遮光层；
    盖板，形成于所述彩膜基板上。
  11. 根据权利要求10所述的显示面板，其中，所述第一散色区域包括多个面积相等的第一区域，每一所述第一区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第一区域内；
    所述第二散色区域包括多个面积相等的第二区域，每一所述第二区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第二区域内；
    所述第三散色区域包括多个面积相等的第三区域，每一所述第三区域与一所述显示单元对应，一所述显示单元在所述散色层上的正投影位于所述第三区域内。
  12. 根据权利要求11所述的显示面板，其中，所述显示单元的形状为多边形或圆形。
  13. 根据权利要求11所述的显示面板，其中，所述散色层的最小折射率不小于所述彩膜基板以及所述薄膜封装层的折射率。
  14. 根据权利要求10所述的显示面板，其中，所述非散色区域由黑色遮光材料制成。
  15. 根据权利要求10所述的显示面板，其中，每一所述彩色滤光单元与对应的所述显示单元显示的颜色相同。
  16. 根据权利要求10所述的显示面板，其中，每一所述显示单元为红色子像素、绿色子像素、蓝色子像素中的一种。
  17. 根据权利要求16所述的显示面板，其中，所述显示单元包括第一显示单元、第二显示单元以及第三显示单元；
    所述第一显示单元、所述第二显示单元以及所述第三显示单元为红色子像素、绿色子像素、蓝色子像素中的一种，且所述第一显示单元、所述第二显示单元以及所述第三显示单元的子像素颜色各不相同。
PCT/CN2018/099398 2018-05-28 2018-08-08 显示面板及显示装置 Ceased WO2019227669A1 (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/086,457 US11171312B2 (en) 2018-05-28 2018-08-08 Display panel and display device having dispersion and non-dispersion areas

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810519539.6 2018-05-28
CN201810519539.6A CN108766980B (zh) 2018-05-28 2018-05-28 一种显示面板及显示装置

Publications (1)

Publication Number Publication Date
WO2019227669A1 true WO2019227669A1 (zh) 2019-12-05

Family

ID=64006175

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/099398 Ceased WO2019227669A1 (zh) 2018-05-28 2018-08-08 显示面板及显示装置

Country Status (3)

Country Link
US (1) US11171312B2 (zh)
CN (1) CN108766980B (zh)
WO (1) WO2019227669A1 (zh)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109638036B (zh) * 2018-11-13 2021-04-02 武汉华星光电半导体显示技术有限公司 显示面板及移动设备
CN109407195A (zh) * 2018-12-18 2019-03-01 武汉华星光电半导体显示技术有限公司 滤光片、显示面板及滤光片制备方法
CN109686245B (zh) * 2019-02-19 2020-08-25 绵阳京东方光电科技有限公司 显示面板及制作方法
WO2020202736A1 (ja) * 2019-03-29 2020-10-08 パナソニックＩｐマネジメント株式会社 光デバイス、光電変換装置、および燃料生成装置
CN109994535B (zh) * 2019-04-24 2021-01-26 京东方科技集团股份有限公司 一种显示面板及显示装置
WO2021035403A1 (zh) * 2019-08-23 2021-03-04 京东方科技集团股份有限公司 发光二极管显示面板及其制作方法、显示装置
WO2023022830A1 (en) * 2021-08-20 2023-02-23 Apple Inc. Polarizer-free display
US12295204B2 (en) 2021-08-20 2025-05-06 Apple Inc. Polarizer-free displays
CN114335131B (zh) * 2022-01-14 2026-01-23 京东方科技集团股份有限公司 显示基板、显示面板和显示装置
CN115332463B (zh) * 2022-08-19 2026-02-17 京东方科技集团股份有限公司 一种显示面板及显示装置
CN115440913B (zh) 2022-08-24 2023-09-08 武汉华星光电半导体显示技术有限公司 显示面板和显示装置
CN119767960B (zh) * 2024-12-30 2026-04-24 武汉华星光电半导体显示技术有限公司 显示面板及显示装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050275343A1 (en) * 2004-05-18 2005-12-15 Jun Tanaka Organic electroluminescence display apparatus
US20130320842A1 (en) * 2012-05-31 2013-12-05 Samsung Display Co., Ltd. Organic light emitting display apparatus and method of manufacturing the same
CN103928489A (zh) * 2013-08-02 2014-07-16 厦门天马微电子有限公司 有机发光二极管显示面板及其形成方法
CN107546338A (zh) * 2017-08-29 2018-01-05 上海天马微电子有限公司 有机发光显示面板及有机发光显示装置

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006053378A (ja) * 2004-08-12 2006-02-23 Seiko Epson Corp 電気光学装置、電気光学装置の製造方法及び電子機器
JP4707521B2 (ja) * 2005-09-30 2011-06-22 大日本印刷株式会社 カラーフィルタおよびこれを有する半透過半反射型液晶表示装置
WO2011061789A1 (ja) * 2009-11-17 2011-05-26 富士電機ホールディングス株式会社 有機ｅｌディスプレイ
WO2011121668A1 (ja) * 2010-03-31 2011-10-06 パナソニック株式会社 表示パネル装置及び表示パネル装置の製造方法
KR102010429B1 (ko) * 2011-02-25 2019-08-13 가부시키가이샤 한도오따이 에네루기 켄큐쇼 발광 장치 및 발광 장치를 사용한 전자 기기
KR101953822B1 (ko) * 2012-08-14 2019-03-06 삼성디스플레이 주식회사 액정 표시 장치
KR102071330B1 (ko) * 2012-12-27 2020-01-30 엘지디스플레이 주식회사 유기 발광 표시 장치 및 유기 발광 표시 장치 제조 방법
TWI535003B (zh) * 2013-05-24 2016-05-21 群創光電股份有限公司 有機發光顯示裝置
JP6191287B2 (ja) * 2013-07-05 2017-09-06 ソニー株式会社 表示装置
US9494792B2 (en) * 2013-07-30 2016-11-15 Global Oled Technology Llc Local seal for encapsulation of electro-optical element on a flexible substrate
KR102092842B1 (ko) * 2013-08-07 2020-04-16 삼성디스플레이 주식회사 표시 패널 및 이의 제조 방법
JP6521610B2 (ja) * 2014-11-10 2019-05-29 株式会社ジャパンディスプレイ 画像表示装置
CN105954947B (zh) * 2016-06-21 2019-01-15 武汉华星光电技术有限公司 液晶显示器
JP6595444B2 (ja) * 2016-08-31 2019-10-23 エルジー ディスプレイ カンパニー リミテッド 表示装置
KR102700941B1 (ko) * 2016-10-21 2024-09-02 삼성디스플레이 주식회사 재귀반사층을 갖는 컬러 기판 및 이를 포함하는 표시 장치
CN106653803B (zh) * 2016-11-21 2019-06-14 上海天马有机发光显示技术有限公司 一种有机发光显示面板和有机发光显示装置
KR102662681B1 (ko) * 2016-12-26 2024-04-30 엘지디스플레이 주식회사 터치 스크린 일체형 표시장치와 그의 제조방법
KR102756220B1 (ko) * 2016-12-28 2025-01-17 엘지디스플레이 주식회사 표시 장치
CN106953020B (zh) * 2016-12-30 2020-02-07 上海天马有机发光显示技术有限公司 一种有机发光显示器件和有机发光显示装置
CN106981503B (zh) * 2017-04-27 2019-11-15 上海天马微电子有限公司 一种显示面板及电子设备
KR102583835B1 (ko) * 2017-06-14 2023-10-05 삼성디스플레이 주식회사 편광층 및 이를 포함하는 표시 장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050275343A1 (en) * 2004-05-18 2005-12-15 Jun Tanaka Organic electroluminescence display apparatus
US20130320842A1 (en) * 2012-05-31 2013-12-05 Samsung Display Co., Ltd. Organic light emitting display apparatus and method of manufacturing the same
CN103928489A (zh) * 2013-08-02 2014-07-16 厦门天马微电子有限公司 有机发光二极管显示面板及其形成方法
CN107546338A (zh) * 2017-08-29 2018-01-05 上海天马微电子有限公司 有机发光显示面板及有机发光显示装置

Also Published As

Publication number Publication date
CN108766980B (zh) 2021-02-23
US11171312B2 (en) 2021-11-09
US20210184178A1 (en) 2021-06-17
CN108766980A (zh) 2018-11-06

Similar Documents

Publication Publication Date Title
WO2019227669A1 (zh) 显示面板及显示装置
CN104062800B (zh) 一种显示基板、显示面板及显示装置
US9093398B2 (en) Brightness enhanced self-luminous display
US10367171B2 (en) Low reflective display device
CN112531006A (zh) 有机发光显示面板和有机发光显示装置
TWI581478B (zh) 具有光學諧振層的oled器件及其製備方法
WO2020037907A1 (zh) 有机发光显示面板及其制造方法
CN106597748A (zh) 一种显示用基板、液晶显示面板及液晶显示装置
CN102809846A (zh) 显示设备
US10203545B2 (en) Display panels and polarizers thereof
US20230037592A1 (en) Display panel, method for manufacturing the same, and display device
CN108922914A (zh) 一种oled显示面板及显示装置
WO2019206016A1 (zh) 显示面板及控制方法、显示装置
CN116234364A (zh) 显示面板及显示装置
WO2020168669A1 (zh) 量子点液晶显示器
US20240049551A1 (en) Display panel
CN109309170B (zh) 一种显示面板及显示装置
CN112965293A (zh) 一种色转换基板和显示面板
KR20180107385A (ko) 광루미네선스 장치, 이의 제조 방법 및 이를 포함하는 표시 장치
JP5782812B2 (ja) 有機エレクトロルミネッセンス装置および有機エレクトロルミネッセンス素子用対向基板
US20240414994A1 (en) Organic light-emitting diode display panel
US10527888B2 (en) Liquid crystal display panel and liquid crystal display device
CN109599037B (zh) 显示面板及其制备方法
CN114300518A (zh) Oled显示面板
CN114967210B (zh) 一种反射显示模组及其制备方法

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: 18921219

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: 18921219

Country of ref document: EP

Kind code of ref document: A1