WO2023109239A1 - 显示面板以及显示装置 - Google Patents

显示面板以及显示装置 Download PDF

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Publication number
WO2023109239A1
WO2023109239A1 PCT/CN2022/120643 CN2022120643W WO2023109239A1 WO 2023109239 A1 WO2023109239 A1 WO 2023109239A1 CN 2022120643 W CN2022120643 W CN 2022120643W WO 2023109239 A1 WO2023109239 A1 WO 2023109239A1
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WO
WIPO (PCT)
Prior art keywords
layer
display panel
light
buffer
substrate
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PCT/CN2022/120643
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English (en)
French (fr)
Inventor
李绍�
孙丹丹
梅瑞琼
张卫帅
Original Assignee
合肥维信诺科技有限公司
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Application filed by 合肥维信诺科技有限公司 filed Critical 合肥维信诺科技有限公司
Priority to JP2023566961A priority Critical patent/JP2024516260A/ja
Priority to KR1020237037087A priority patent/KR20230156796A/ko
Publication of WO2023109239A1 publication Critical patent/WO2023109239A1/zh
Priority to US18/498,434 priority patent/US20240062715A1/en

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • G06F3/0443—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a single layer of sensing electrodes

Definitions

  • the present application relates to the field of display technology, in particular to a display panel and a display device.
  • the mainstream of depolarizing film technology is to replace the polarizing film with the structure of the color film layer, so that the thickness of the display panel is reduced by more than 100um, the brightness is increased by 20%, and the limit bending radius of the flexible screen is also effectively reduced. .
  • Embodiments of the present application provide a display panel and a display device.
  • the display panel can meet display requirements, and at the same time can effectively reduce the part of the color filter layer that needs to be removed remaining on the touch layer, so as to ensure the luminous efficiency of the display panel.
  • a display panel including: a light-emitting device layer, including a stacked substrate and a light-emitting layer, the light-emitting layer has a number of sub-pixel units distributed in an array; a touch layer, disposed on the light-emitting layer away from On one side of the substrate, the touch layer includes touch electrodes and a planarization layer covering the touch electrodes; the buffer layer is arranged on the side of the planarization layer away from the light-emitting device layer; the optical film layer is arranged on the buffer layer away from the touch control layer.
  • the optical film layer includes several black matrices and several filter units arranged on the same layer as the black matrix, and the several filter units are arranged in one-to-one correspondence with several sub-pixel units; wherein, the material of the buffer layer is the same as that of the planarization layer The material is sparse, and the orthographic projection of the buffer layer on the substrate covers the orthographic projection of the filter unit on the substrate.
  • an embodiment of the present application provides a display device, including the above-mentioned display panel.
  • the display panel includes a light-emitting device layer, a touch layer, a buffer layer, and an optical film layer.
  • the sub-pixel units of the light-emitting device layer can meet the requirements of light-emitting display.
  • the setting of the film layer can not only ensure that the display panel is integrated with the touch function, but also, by adding a buffer layer between the optical film layer and the touch layer, at the same time, the orthographic projection of the buffer layer on the substrate covers the filter unit on the substrate
  • the orthographic projection of the optical film layer can separate the sub-pixel areas corresponding to the black matrix and the planarization layer through the buffer layer during the molding process, avoiding direct contact between the black matrix and the sub-pixel areas corresponding to the planarization layer, and making the buffer
  • the material of the layer and the material of the planarization layer are sparse, which can ensure that when the black matrix of the optical film layer is patterned, the mutual solubility of the buffer layer and the black matrix is much lower than that of the planarization layer and the black matrix, reducing or avoiding The black matrix remains in the patterned area corresponding to each sub-pixel unit to ensure the transmittance of light emitted by the sub-pixel unit, ensure the luminous efficiency of the display panel, and optimize the display effect.
  • FIG. 1 is a schematic structural diagram of a display panel according to an embodiment of the present application.
  • Fig. 2 is a sectional view along A-A direction among Fig. 1;
  • FIG. 3 is a schematic cross-sectional view of a display panel according to another embodiment of the present application.
  • FIG. 4 is a schematic cross-sectional view of a display panel according to another embodiment of the present application.
  • FIG. 5 is a schematic cross-sectional view of a display panel according to yet another embodiment of the present application.
  • FIG. 6 is a schematic cross-sectional view of a display panel according to another embodiment of the present application.
  • Color filter on encapsulation (COE) technology is currently the mainstream of depolarizer technology. It uses a color filter layer structure to replace the polarizer, thereby reducing the thickness of the display panel by more than 100um. The brightness is increased by 20%, which also effectively reduces the ultimate bending radius of the flexible screen.
  • COE Color filter on encapsulation
  • COE technology also has inherent defects. Since the color filter layer is directly produced on the touch layer, the current material matching is not good, and there is a problem of mutual solubility between the color filter layer and the touch layer. , it is necessary to form a black matrix layer on the touch layer in advance, and then pattern the black matrix, for example, by exposing and developing to remove the area corresponding to the sub-pixel unit on the touch layer, and then form a black matrix at the corresponding position of each sub-pixel unit The filter unit satisfies the function of light filtering.
  • the embodiments of the present application provide a display panel and a display device.
  • the display panel can meet the display requirements, and at the same time, it can effectively reduce the part of the color filter layer that needs to be removed from remaining on the touch layer, ensuring the display panel. Luminous efficiency.
  • a display panel including a light-emitting device layer, a touch layer 30, a buffer layer 40, and an optical film layer 50.
  • the light-emitting device layer includes a stacked substrate 10 and The light emitting layer 20, the light emitting layer 20 has several sub-pixel units 20a distributed in an array.
  • the touch layer 30 is disposed on the side of the light emitting layer 20 away from the substrate 10 , and the touch layer 30 includes touch electrodes 31 and a planarization layer 32 covering the touch electrodes 31 .
  • the buffer layer 40 is disposed on the side of the planarization layer 32 away from the light emitting device layer.
  • the optical film layer 50 is arranged on the side of the buffer layer 40 away from the touch layer 30.
  • the optical film layer 50 includes several black matrices 51 and several filter units 52 arranged on the same layer as the black matrix 51.
  • the pixel units 20a are arranged in one-to-one correspondence.
  • the material of the buffer layer 40 is distant from the material of the planarization layer 32
  • the orthographic projection of the buffer layer 40 on the substrate 10 covers the orthographic projection of the filter unit 52 on the substrate 10 .
  • the display panel provided by the embodiment of the present application can meet the requirement of light-emitting display through the sub-pixel unit 20a of the light-emitting device layer.
  • the arrangement of the touch layer 30 and the optical film layer 50 can ensure that the display panel is integrated with a touch function, and by adding a buffer layer 40 between the optical film layer 50 and the touch layer 30, the buffer layer 40 can be placed on the substrate at the same time.
  • the orthographic projection on 10 covers the orthographic projection of the filter unit 52 on the substrate 10, so that the optical film layer 50 can be separated from the sub-pixel regions corresponding to the black matrix 51 and the planarization layer 32 by the buffer layer 40 during the forming process, Avoid direct contact between the black matrix 51 and the sub-pixel regions corresponding to the planarization layer 32 .
  • the material of the buffer layer 40 and the material of the planarization layer 32 are sparse, which can ensure that when the black matrix 51 of the optical film layer 50 is patterned, the mutual solubility of the buffer layer 40 and the black matrix 51 is much lower than that of the planarization layer 32 and the planarization layer 32.
  • the mutual solubility of the black matrix 51 reduces or avoids the residue of the black matrix 51 in the area corresponding to each sub-pixel unit 21a during patterning, ensures the transmittance of light emitted by the sub-pixel unit 20a, and ensures the luminous efficiency of the display panel. Optimize display effect.
  • the substrate 10 may include a substrate 11 and a device layer 12.
  • the substrate 11 may be a hard substrate, of course, may also be a flexible substrate, which has a certain degree of bendability, and is conducive to forming a curved display screen.
  • the device layer 12 includes a plurality of pixel driving circuits 121 distributed in an array, and each pixel driving circuit 121 is electrically connected to at least one sub-pixel unit 20a to control the lighting time and brightness of the sub-pixel unit 20a.
  • the light-emitting layer 20 is disposed on the side of the device layer 12 facing away from the substrate 11.
  • the number of sub-pixel units 20a and the arrangement of pixels in the light-emitting layer 20 are not specifically limited, as long as the display requirements of the display panel can be met. .
  • the plurality of sub-pixel units 20a of the light emitting layer 20 may include red sub-pixel units, green sub-pixel units and blue sub-pixel units.
  • each sub-pixel unit 20a may include an anode 21, a light-emitting element 22, and a cathode 23, the light-emitting element 22 is located between the anode 21 and the cathode 23, and the anode 21 faces one side of the substrate 11. side and is electrically connected to the pixel driving circuit 121 , and the cathode 23 is arranged on the side of the light emitting element 22 away from the anode 21 .
  • the cathodes 23 of each sub-pixel unit 20a can be set independently.
  • the cathodes 23 of each sub-pixel unit 20a can also be connected to each other to form an integral surface electrode.
  • the touch layer 30 includes a plurality of touch electrodes 31, and the plurality of touch electrodes 31 may be a metal layer formed on the same layer, of course, two or more layers of metal layers may be formed. When there are more than one metal layer, an insulating layer may be provided between adjacent metal layers.
  • the touch control method adopted by the touch layer 30 may be a self-capacitance method, and of course may also be a mutual-capacitance method.
  • the touch electrode 31 may include a touch driving electrode and a touch sensing electrode.
  • the touch driving electrode and the touch sensing electrode may be formed on the same metal layer, and adjacent touch sensing electrodes may pass through a bridge formed on another metal layer. electrical connection.
  • the corresponding touch driving electrodes may also be electrically connected through a bridge formed in another metal layer.
  • the touch driving electrodes and the touch sensing electrodes may also be formed on different metal layers, which are not specifically limited here.
  • the provided buffer layer 40 can be stacked with the planarization layer 32 of the touch layer 30 and connected to each other.
  • the material of the buffer layer 40 and the material of the planarization layer 32 are mutually sparse. Specifically, it may mean that after the black matrix 51 of the optical film layer 50 is patterned, the buffer layer 40 and the planarization layer 32 are incompatible or difficult to dissolve in each other, so that The mutual solubility of the buffer layer 40 and the black matrix 51 is smaller than that of the planarization layer 32 and the black matrix 51 .
  • the buffer layer 40 can be an inorganic material layer
  • the planarization layer 32 can be an organic material layer. Since the planarization layer 32 needs to protect the touch electrodes 31 and play a role in planarization, usually The organic adhesive layer is used, and the black matrix 51 of the optical film layer 50 is usually made of organic materials, and the mutual solubility between the two is high.
  • the buffer layer 40 an inorganic material layer, the polarity of the material of the black matrix 51 is opposite to that of the black matrix 51, and it is not easy to fuse, so that the black matrix 51 is not easy to fuse on the buffer layer 40 during the patterning process of exposure and development. residue, thereby ensuring the luminous efficiency of the display panel.
  • the buffer layer 40 may be made of inorganic materials such as silicon oxide, silicon nitride, and transparent ITO.
  • the orthographic projection of the buffer layer 40 on the substrate 10 may only cover the orthographic projection of the filter unit 52 on the substrate 10, of course, this is an optional implementation, in some embodiments , the orthographic projection of the buffer layer 40 on the substrate 10 may also cover the orthographic projection of the black matrix 51 on the substrate 10 .
  • the buffer layer 40 of the display panel provided in the embodiment of the present application can be a whole layer, so that the orthographic projection of the buffer layer 40 on the substrate 10 can cover the black matrix 51 and the filter unit 52 at the same time. orthographic projection of .
  • the buffer layer 40 completely isolates the black matrix 51 from the planarization layer 32, avoids direct contact between the black matrix 51 and the planarization layer 32, and effectively avoids the problem of mutual dissolution between the black matrix 51 and the planarization layer 32 during the patterning process .
  • the thickness of the whole layer of the buffer layer 40 can be made uniform.
  • the buffer layer 40 has a plurality of accommodation grooves 40a, and the black matrix 51 is at least partially located in the accommodation grooves 40a and forms an accommodation with the enclosure.
  • the walls of the groove 40a are connected.
  • the buffer layer 40 is set as an entire layer and interposed between the touch layer and the optical film layer, and the thickness of the buffer layer 40 and the corresponding area of the black matrix 51 is smaller than that of the corresponding area of the buffer layer 40 and the filter unit 52. thickness. That is to say, the depth of the receiving groove 40a can be smaller than the thickness of the buffer layer 40, and the buffer layer 40 can completely isolate the black matrix 51 from the planarization layer 32, so that the surface and the sidewall surface of the black matrix 51 facing the light-emitting device layer 12 are all in contact with the buffer layer. 40 touch and connect.
  • the depth of the accommodation groove 40a smaller than the thickness of the buffer layer 40 is only an optional implementation, but it is not limited to the above-mentioned manner. In some other embodiments, the depth of the accommodation groove 40a can also be made equal to the thickness of the buffer layer 40. thickness, that is to say, the receiving groove 40 a is provided through the buffer layer 40 .
  • the buffer layer 40 includes a plurality of buffer units 41 distributed in an array, an accommodation groove 40a is formed between two adjacent buffer units 41, and each buffer unit 41 is connected to one of the filter units.
  • the unit 52 is arranged opposite and covers the surface of the filter unit 52 facing the light-emitting device layer 12, and the black matrix 51 is at least partially located in the accommodation groove 40a and is in contact with the wall surface of the accommodation groove 40a surrounded by the planarization layer 32 and the buffer layer 40.
  • the plurality of filter units 52 may include a red filter unit, a green filter unit, and a blue filter unit, each red filter unit is set opposite to one of the red sub-pixel units, and each Each green filter unit is arranged opposite to one of the green sub-pixel units, and each blue filter unit is arranged opposite to one of the blue sub-pixel units. Not only can the light filtering requirements be guaranteed, but also the luminous efficiency of the display panel can be guaranteed.
  • the refractive index of the buffer layer 40 is smaller than the refractive index of the planarization layer 32 .
  • each sub-pixel unit 20a of the light emitting layer 20 is made of metal material, the area is relatively large. When external light enters the display panel, it will be reflected at the cathode 23, and the reflected light will enter human eyes. Moreover, after canceling the polarizer, increasing the transmittance of the light emitted by the light-emitting layer 20 will increase the reflection of the cathode 23, which will weaken the brightness improvement brought about by canceling the polarizer, affect the brightness improvement effect of the display panel, and is not conducive to user experience. .
  • the critical angle ⁇ satisfies formula (1):
  • n1 is the refractive index of the optically thinner medium
  • n2 is the refractive index of the optically denser medium
  • the sub-pixel unit 20 a is direct light with an incident angle of 90 degrees, and no total reflection effect occurs, so there is no need to worry about light loss.
  • the buffer layer 40 is silicon oxide
  • the planarization layer 32 is organic glue or OC glue as an example.
  • the refractive index of the planarization layer 32 is 1.6
  • the refractive index of the buffer layer 40 is 1.4.
  • the critical angle ⁇ is:
  • the display panel can also include a reflective layer 70, the reflective layer 70 is located between the planarization layer 32 and the light emitting layer 20, the reflective layer 70 can direct the light emitting device layer to the display panel At least part of the light reflected on the light emitting surface side is reflected again to the side where the light emitting device layer 12 is located.
  • the reflective layer 70 By adding the reflective layer 70, after the light entering from the outside is reflected on the cathode 23, the reflected light will act on the reflective layer 70, and at least part of it will be reflected by the reflective layer 70 again to the side where the light-emitting device layer is located, reducing the reflection effect and ensuring The display effect of the display panel.
  • the reflective layer 70 can be arranged at any position on the side of the light emitting device layer 12 away from the substrate 10, that is, It can be said that the reflective layer 70 can be arranged between the cathode 23 and the human eye, so as to ensure that the external light reflected by the cathode 23 can be reflected to the side where the light emitting device layer is located.
  • the reflective layer 70 can be located between the light emitting device layer and the touch layer 30 and connected to the cathode 23 Cascading settings.
  • disposing the reflective layer 70 between the light emitting device layer 12 and the touch layer 30 and stacked with the cathode 23 is only an optional implementation manner, but is not limited to the above manner.
  • the display panel further includes an encapsulation layer 60 located between the touch layer 30 and the substrate 10 .
  • the encapsulation layer 60 is disposed on a side of the touch layer 30 close to the substrate 10 .
  • the encapsulation layer 60 is arranged on the side of the reflective layer 70 close to the substrate 10 , and such arrangement can also meet the requirement of reducing reflection effects.
  • an embodiment of the present application further provides a display device, which includes the above-mentioned display panel.
  • the display device can be any product or component with a display function, such as a mobile phone, a tablet computer, a notebook computer, a digital photo frame, a navigator, and the like.
  • the display device provided by the embodiment of the present application includes the display panel provided by the above-mentioned embodiments, and the sub-pixel unit 20a of the light-emitting device layer 12 can meet the requirements of light-emitting display, and the setting of the touch layer 30 and the optical film layer 50 is It can ensure that the display panel is integrated with a touch function, and, by adding a buffer layer 40 between the optical film layer 50 and the touch layer 30, at the same time, the orthographic projection of the buffer layer 40 on the substrate 10 covers the filter unit 52 on the substrate 10 The orthographic projection on the optical film layer 50 can separate the black matrix 51 and the sub-pixel regions corresponding to the planarization layer 32 through the buffer layer 40 during the molding process, so as to avoid the black matrix 51 and the planarization layer 32 corresponding to the sub-pixels.
  • the level of chemical corrosion resistance of the buffer layer 40 is higher than the level of chemical corrosion resistance of the planarization layer 32, which can ensure that the black matrix 51 of the optical film layer 50 is patterned, the buffer layer 40 and the black matrix
  • the miscibility of the 51 is much lower than that of the planarization layer 32 and the black matrix 51, reducing or avoiding the residue of the black matrix 51 in the patterned area corresponding to each sub-pixel unit 21a, and ensuring the light emitted by the sub-pixel unit 20a.
  • the transmittance ensures the luminous efficiency of the display device and optimizes the display effect.

Abstract

本申请涉及一种显示面板以及显示装置，显示面板包括：发光器件层，包括层叠设置的基板以及发光层，发光层具有阵列分布的若干子像素单元；触控层，包括触控电极以及覆盖触控电极设置的平坦化层；缓冲层，设置于平坦化层背离发光器件层的一侧；光学膜层，设置于缓冲层背离触控层的一侧，光学膜层包括若干黑矩阵以及与黑矩阵同层设置的若干滤光单元，若干滤光单元与若干子像素单元一一对应设置；缓冲层的材料与平坦化层的材料相疏，缓冲层在基板上的正投影覆盖滤光单元在基板上的正投影。本申请实施例提供的显示面板以及显示装置，显示面板能够满足显示要求，同时能够有效降低彩膜层需要去除的部分在触控层上残留，保证显示面板的发光效率。

Description

显示面板以及显示装置
相关申请的交叉引用
本申请要求享有于2021年12月16日提交的名称为“显示面板以及显示装置”的中国专利申请第202111544912.1号的优先权，该申请的全部内容通过引用并入本文中。
技术领域
本申请涉及显示技术领域，特别是涉及一种显示面板以及显示装置。
背景技术
目前去偏振片技术中的主流为采用彩膜层的结构来代替偏光片，从而使得显示面板的厚度减小了100um以上，亮度提升20％，也有效的减小了柔性屏幕的极限弯折半径。
但是采用彩膜层的结构来代替偏光片技术也存在先天的缺陷，由于彩膜层直接制作于触控层上，现行的材料匹配性欠佳，存在彩膜层与触控层互溶的问题，图案化后彩膜层的去除部分将残留在触控层上，从而影响显示面板的发光效率。
发明内容
本申请实施例提供一种显示面板以及显示装置，显示面板能够满足显示要求，同时能够有效降低彩膜层需要去除的部分在触控层上残留，保证显示面板的发光效率。
一方面，根据本申请实施例提出了一种显示面板，包括：发光器件层，包括层叠设置的基板以及发光层，发光层具有阵列分布的若干子像素单元；触控层，设置于发光层背离基板的一侧，触控层包括触控电极以及覆盖触控电极设置的平坦化层；缓冲层，设置于平坦化层背离发光器件层 的一侧；光学膜层，设置于缓冲层背离触控层的一侧，光学膜层包括若干黑矩阵以及与黑矩阵同层设置的若干滤光单元，若干滤光单元与若干子像素单元一一对应设置；其中，缓冲层的材料与平坦化层的材料相疏，缓冲层在基板上的正投影覆盖滤光单元在基板上的正投影。
另一个方面，根据本申请实施例提供一种显示装置，包括上述的显示面板。
根据本申请实施例提供的显示面板以及显示装置，显示面板包括发光器件层、触控层、缓冲层以及光学膜层，通过发光器件层的子像素单元能够满足发光显示需求，触控层以及光学膜层的设置，既能够保证显示面板集成有触控功能，并且，通过在光学膜层与触控层之间增设缓冲层，同时使得缓冲层在基板上的正投影覆盖滤光单元在基板上的正投影，使得光学膜层在成型的过程中，可以通过缓冲层对黑矩阵与平坦化层对应各子像素区域分隔，避免黑矩阵与平坦化层对应各子像素区域直接接触，并且使得缓冲层的材料与平坦化层的材料相疏，能够保证光学膜层的黑矩阵在图案化时，缓冲层与黑矩阵的互溶能力远低于平坦化层与黑矩阵的互溶能力，减小或者避免黑矩阵在图案化在各子像素单元对应的区域发生残留，保证子像素单元所发出光线的穿透率，保证显示面板的发光效率，优化显示效果。
附图说明
图1是本申请一个实施例的显示面板的结构示意图；
图2是图1中沿A-A方向的剖视图；
图3是本申请另一个实施例的显示面板的剖视示意图；
图4是本申请又一个实施例的显示面板的剖视示意图；
图5是本申请再一个实施例的显示面板的剖视示意图；
图6是本申请又一个实施例的显示面板的剖视示意图。
具体实施方式
下面将详细描述本申请的各个方面的特征和示例性实施例。此外，下 文中所描述的特征、结构或特性可以以任何合适的方式结合在一个或更多实施例中。
封装上的彩色滤光片技术(Color filter on encapsulation，COE)是目前去偏振片技术中的主流，其采用彩膜层的结构来代替偏光片，从而使得显示面板的厚度减小了100um以上，亮度提升20％，也有效的减小了柔性屏幕的极限弯折半径。
但是COE技术也存在先天的缺陷，由于彩膜层直接制作于触控层上，现行的材料匹配性欠佳，存在彩膜层与触控层互溶的问题，由于彩膜层在成型的过程中，需要预先在触控层上形成黑矩阵层，然后对黑矩阵进行图案化，例如采用曝光、显影方式去除在触控层上与子像素单元对应的区域，然后在各子像素单元对应位置形成滤光单元，以满足滤光的作用。已有的显示面板，其对彩膜层的黑矩阵图案化去除覆盖子像素单元对应区域时，存在黑矩阵与触控层的平坦化层发生互溶的问题，使得黑矩阵还有部分残留在触控层上，尤其是在与子像素单元对应的区域，当有黑矩阵残留时，将影响子像素单元所发出光线的透过率，影响显示面板的发光效率。
因此，为了解决上述技术问题，本申请实施例提供一种显示面板及显示装置，显示面板能够满足显示要求，同时能够有效降低彩膜层需要去除的部分在触控层上残留，保证显示面板的发光效率。
为了更好的理解本申请，下面结合图1至图6对本申请实施例显示面板及显示装置进行详细描述。
请参见图1以及图2所示根据本申请实施例提出了一种显示面板，包括发光器件层、触控层30、缓冲层40以及光学膜层50，发光器件层包括层叠设置的基板10以及发光层20，发光层20具有阵列分布的若干子像素单元20a。触控层30设置于发光层20背离基板10的一侧，触控层30包括触控电极31以及覆盖触控电极31设置的平坦化层32。缓冲层40设置于平坦化层32背离发光器件层的一侧。光学膜层50设置于缓冲层40背离触控层30的一侧，光学膜层50包括若干黑矩阵51以及与黑矩阵51同层设置的若干滤光单元52，若干滤光单元52与若干子像素单元20a一一对 应设置。其中，缓冲层40的材料与平坦化层32的的材料相疏，缓冲层40在基板10上的正投影覆盖滤光单元52在基板10上的正投影。
本申请实施例提供的显示面板，通过发光器件层的子像素单元20a能够满足发光显示需求。触控层30以及光学膜层50的设置，既能够保证显示面板集成有触控功能，并且，通过在光学膜层50与触控层30之间增设缓冲层40，同时使得缓冲层40在基板10上的正投影覆盖滤光单元52在基板10上的正投影，使得光学膜层50在成型的过程中，可以通过缓冲层40对黑矩阵51与平坦化层32对应各子像素区域分隔，避免黑矩阵51与平坦化层32对应各子像素区域直接接触。并且缓冲层40的材料与平坦化层32的的材料相疏，能够保证光学膜层50的黑矩阵51在图案化时，缓冲层40与黑矩阵51的互溶能力远低于平坦化层32与黑矩阵51的互溶能力，减小或者避免黑矩阵51在图案化时在各子像素单元21a对应的区域发生残留，保证子像素单元20a所发出光线的穿透率，保证显示面板的发光效率，优化显示效果。
可选地，基板10可以包括衬底11以及器件层12，衬底11可以为硬质衬底，当然也可以为柔性衬底，具有一定的可弯折性，利于形成曲面显示屏。可选地，器件层12包括多个阵列分布的像素驱动电路121，每个像素驱动电路121与至少一个子像素单元20a电连接，以控制子像素单元20a的点亮时间以及亮度等。
可选地，发光层20设置于器件层12背离衬底11的一侧，发光层20的子像素单元20a的数量以及像素排布方式不做具体限定，只要能够满足显示面板的显示需求均可。
可选地，发光层20的多个子像素单元20a可以包括红色子像素单元、绿色子像素单元以及蓝色子像素单元。
参阅图2至图6，可选地，每个子像素单元20a可以包括阳极21、发光元件22以及阴极23，发光元件22位于阳极21与阴极23之间，阳极21面向所述衬底11的一侧并与像素驱动电路121电连接，阴极23设置于发光元件22背离阳极21的一侧。
可选地，各子像素单元20a的阴极23可以独立设置，当然，在有些实 施例中，也可以使得各子像素单元20a的阴极23相互连接形成一整体设置的面电极。
可选地，触控层30包括多个触控电极31，多个触控电极31可以是形成于同一层的金属层，当然也可以是形成两层或者以上的多层金属层，当形成两层以上金属层时，相邻金属层之间可以设置有绝缘层。可选地，触控层30采用的触控方式可以是自电容的方式，当然也可以为互电容的方式。触控电极31可以包括触控驱动电极以及触控感应电极，触控驱动电极以及触控感应电极可以形成于同一金属层，相邻的触控感应电极可以通过形成于另一金属层的过桥电连接。当然，也可以使得相应的触控驱动电极通过形成于另一金属层的过桥电连接。当然，在有些实施例中，触控驱动电极以及触控感应电极也可以形成于不同的金属层，在此不做具体限定。
可选地，所提供的缓冲层40可以与触控层30的平坦化层32层叠设置并相互接触连接。缓冲层40的材料与平坦化层32的的材料相疏，具体可以是指光学膜层50的黑矩阵51在图案化后，缓冲层40与平坦化层32不互溶或者较难互溶，而令缓冲层40与黑矩阵51的互溶能力小于平坦化层32与黑矩阵51的溶合能力。
作为一种可选地实施方式，缓冲层40可以为无机材料层，平坦化层32可以为有机材料层，由于平坦化层32需要对触控电极31进行防护同时起到平坦化的作用，通常采用有机胶层，而光学膜层50的黑矩阵51通常采用有机材料制成，二者之间的互溶性高。通过使得缓冲层40为无机材料层，使其与黑矩阵51的材料极性相反，不易溶合，进而使得黑矩阵51在曝光、显影进行图案化的过程中，不易在缓冲层40上溶合残留，进而保证显示面板的发光效率。
在一些可选地实施例中，缓冲层40可以采用氧化硅、氮化硅以及透明ITO等无机材料制成。
作为一种可选地实施方式，缓冲层40在基板10上的正投影可以仅覆盖滤光单元52在基板10上正投影，当然，此为一种可选地实施方式，在有些实施例中，也可以使得缓冲层40在基板10上的正投影还覆盖黑矩阵 51在基板10上的正投影。
作为一种可选地实施方式，本申请实施例提供的显示面板，其缓冲层40可以为一整层，可以使得缓冲层40在基板10上的正投影同时覆盖黑矩阵51以及滤光单元52的正投影。通过缓冲层40将黑矩阵51与平坦化层32完全隔离，避免黑矩阵51与平坦化层32直接接触，有效的避免黑矩阵51在图案化过程中与平坦化层32彼此之间互溶的问题。
在一些可选地实施例中，当缓冲层40为一整层时，可以使得缓冲层40整层厚度均匀。通过上述设置，能够有效的避免黑矩阵51与平坦化层32直接接触，进而避免黑矩阵51在图案化过程中与平坦化层32彼此之间互溶的问题，同时能够利于缓冲层40的成型。
请参见图3，在一些可选地实施例中，本申请实施例提供的显示面板，缓冲层40上具有多个容纳槽40a，黑矩阵51至少部分位于容纳槽40a内并与围合形成容纳槽40a的壁面连接。通过上述设置，增加黑矩阵51与其他层结构之间的粘附面积，保证层结构之间的连接强度，避免发生黑矩阵51剥离现象。在本实施方式中，缓冲层40对应黑矩阵51处的厚度小于对应滤光单元52处的厚度。
作为可选的实施方式，缓冲层40整层设置并夹设于触控层与光学膜层之间，缓冲层40与黑矩阵51对应区域的厚度小于缓冲层40与滤光单元52对应区域的厚度。也就是说，容纳槽40a的深度可以小于缓冲层40的厚度，缓冲层40可以完全隔离黑矩阵51与平坦化层32，使得黑矩阵51面向发光器件层12的表面以及侧壁面均与缓冲层40接触并连接。
当然，使得容纳槽40a的深度小于缓冲层40的厚度只是一种可选地实施方式，但不限于上述方式，在一些其他的实施例中，还可以使得容纳槽40a的深度等于缓冲层40的厚度，也就是说容纳槽40a贯穿缓冲层40设置。
请参见图4，一些可选的示例中，缓冲层40包括多个阵列分布的缓冲单元41，相邻两个缓冲单元41之间形成有容纳槽40a，每个缓冲单元41与其中一个滤光单元52相对设置并覆盖滤光单元52面向发光器件层12的表面，黑矩阵51至少部分位于容纳槽40a内并与由平坦化层32以及缓冲 层40围合形成的容纳槽40a的壁面接触。
作为一种可选地实施方式，多个滤光单元52可以包括红色滤光单元、绿色滤光单元以及蓝色滤光单元，每个红色滤光单元与其中一个红色子像素单元相对设置，每个绿色滤光单元与其中一个绿色子像素单元相对设置，每个蓝色滤光单元与其中一个蓝色子像素单元相对设置。既能够保证滤光要求，同时还能够保证显示面板的发光效率。
在一些可选地实施例中，本申请上述各实施例提供的显示面板，其缓冲层40的折射率小于平坦化层32的折射率。
由于发光层20的各子像素单元20a的阴极23为金属材料，面积较大。当外界光线进入显示面板内时，将会在阴极23处发生反射，反射的光线将会进入人眼。并且，在取消掉偏光片后，增加发光层20发出光线透过率会使得阴极23的反射增加，削弱了取消偏光片带来的亮度提升，影响显示面板的亮度提升效果，且不利于用户体验。
而本申请实施例提供的显示面板，通过使得缓冲层40的折射率小于平坦化层32的折射率，当光线由光密介质射入光疏介质，入射角满足一定条件时将发生全反射效应。临界角α满足式(1)：
α＝arcsin(n1/n2)           (1)
其中，n1为光疏介质的折射率，n2为光密介质的折射率。
由此，阴极23反射光的入射角大于临界角的所有光线将全部反射回屏幕内部，从而减弱了人眼接收到的反射光，提高了屏幕的亮度。而子像素单元20a为直射光，入射角为90度，不会发生全反射效应，因此无须担心光的损失。
本方案以缓冲层40为氧化硅，平坦化层32为有机胶或者说OC胶为例，平坦化层32的折射率为1.6，缓冲层40的折射率为1.4，则临界角α为：
α＝arc(1.45/1.6)＝65°
由此可知，入射角大于65°的阴极23反射光将全部被反射。理论上，25％的反射光将被屏蔽，显著提升亮度。
请参见图5以及图6所示，本申请上述各实施例提供的显示面板，对 于阴极23的反射问题采用缓冲层40的折射率小于平坦化层32的折射率的方式解决只是一种可选地实施方式，在一些其他的实施例中，还可以使得显示面板还包括反光层70，反光层70位于平坦化层32以及发光层20之间，反光层70能够将发光器件层向显示面板的出光面侧反射的光线至少部分再次反射至发光器件层12所在侧。
通过增加反光层70，使得外界照射进入的光线在阴极23上发生反射后，反射的光线将作用于反光层70，至少部分被反光层70再次反射至发光器件层所在侧，降低反射影响，保证显示面板的显示效果。
作为一种可选地实施方式，本申请实施例提供的显示面板，当显示面板包括反光层70时，可以将反光层70设置于发光器件层12背离基板10的一侧的任意位置，也就是说可以将反光层70设置于阴极23与人眼之间，以保证将阴极23反射的外界光线再次反射至发光器件层所在侧均可。
如图5所示，在一些可选地实施例中，本申请实施例提供的显示面板，当包括反光层70时，反光层70可以位于发光器件层与触控层30之间并与阴极23层叠设置。
当然，将反光层70设置于发光器件层12与触控层30之间并与阴极23层叠设置只是一种可选地实施方式，但不限于上述方式。
如图2至图4及图6所示，显示面板还包括位于触控层30和基板10之间的封装层60。如图2至图4所示，封装层60设置于触控层30靠近基板10一侧。如图6所示，封装层60设置于反光层70靠近基板10一侧，如此设置，同样能够满足降低反射影响的要求。
另一方面，本申请实施例还提供一种显示装置，显示装置包括上述的显示面板。该显示装置可以是手机、平板电脑、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
本申请实施例提供的显示装置，因其包括上述各实施例提供的显示面板，通过发光器件层12的子像素单元20a能够满足发光显示需求，触控层30以及光学膜层50的设置，既能够保证显示面板集成有触控功能，并且，通过在光学膜层50与触控层30之间增设缓冲层40，同时使得缓冲层 40在基板10上的正投影覆盖滤光单元52在基板10上的正投影，使得光学膜层50在成型的过程中，可以通过缓冲层40对黑矩阵51与平坦化层32对应各子像素区域分隔，避免黑矩阵51与平坦化层32对应各子像素区域直接接触，并且缓冲层40的耐化学腐蚀性的等级高于平坦化层32的耐化学腐蚀性的等级，能够保证光学膜层50的黑矩阵51在图案化时，缓冲层40与黑矩阵51的互溶能力远低于平坦化层32与黑矩阵51的互溶能力，减小或者避免黑矩阵51在图案化在各子像素单元21a对应的区域发生残留，保证子像素单元20a所发出光线的穿透率，保证显示装置的发光效率，优化显示效果。
虽然已经参考优选实施例对本申请进行了描述，但在不脱离本申请的范围的情况下，可以对其进行各种改进并且可以用等效物替换其中的部件。尤其是，只要不存在结构冲突，各个实施例中所提到的各项技术特征均可以任意方式组合起来。本申请并不局限于文中公开的特定实施例，而是包括落入权利要求的范围内的所有技术方案。

Claims (16)

  1. 一种显示面板，包括：
    发光器件层，包括层叠设置的基板以及发光层，所述发光层具有阵列分布的若干子像素单元；
    触控层，设置于所述发光层背离所述基板的一侧，所述触控层包括触控电极以及覆盖所述触控电极设置的平坦化层；
    缓冲层，设置于所述平坦化层背离所述发光器件层的一侧；
    光学膜层，设置于所述缓冲层背离所述触控层的一侧，所述光学膜层包括若干黑矩阵以及与所述黑矩阵同层设置的若干滤光单元，所述若干滤光单元与所述若干子像素单元一一对应设置；
    其中，所述缓冲层的材料与所述平坦化层的材料相疏，所述缓冲层在所述基板上的正投影覆盖所述滤光单元在所述基板上的正投影。
  2. 根据权利要求1所述的显示面板，其中，所述缓冲层在所述基板上的正投影还覆盖所述黑矩阵在所述基板上的正投影。
  3. 根据权利要求2所述的显示面板，其中，所述缓冲层整层设置且厚度均匀。
  4. 根据权利要求1所述的显示面板，其中，所述缓冲层上具有多个容纳槽，所述黑矩阵至少部分位于所述容纳槽内并与所述容纳槽的内壁面抵接。
  5. 根据权利要求4所述的显示面板，其中，所述缓冲层包括阵列分布的若干缓冲单元，所述容纳槽由所述平坦化层以及所述若干缓冲单元围合形成而令每一所述容纳槽位于相邻两个所述缓冲单元之间，所述缓冲单元与所述滤光单元一一对应设置并覆盖对应所述滤光单元面向所述发光器件层的表面。
  6. 根据权利要求4所述的显示面板，其中，所述容纳槽的深度等于所述缓冲层的厚度，所述容纳槽贯穿所述缓冲层设置。
  7. 根据权利要求4所述的显示面板，其中，所述缓冲层整层设置并夹设于触控层与光学膜层之间，所述缓冲层与所述黑矩阵对应区域的厚度 小于所述缓冲层与所述滤光单元对应区域的厚度。
  8. 根据权利要求1所述的显示面板，其中，所述缓冲层为无机材料层，所述平坦化层为有机材料层。
  9. 根据权利要求8所述的显示面板，其中，所述缓冲层包括氧化硅、氮化硅以及透明氧化铟锡中的至少一者。
  10. 根据权利要求1所述的显示面板，其中，所述缓冲层的折射率小于所述平坦化层的折射率。
  11. 根据权利要求1至10任意一项所述的显示面板，其中，所述显示面板还包括反光层，所述反光层位于所述平坦化层以及所述发光层之间，所述反光层能够将所述发光器件层向出光面侧反射的光线至少部分再次反射至所述发光器件层所在侧。
  12. 根据权利要求11所述的显示面板，其中，所述子像素单元包括阳极、发光元件以及阴极，所述反光层在所述基板上的正投影覆盖各所述子像素单元的所述阴极。
  13. 根据权利要求12所述的显示面板，其中，所述反光层位于所述发光器件层与所述触控层之间并与所述阴极层叠设置。
  14. 根据权利要求11所述的显示面板，其中，所述显示面板还包括位于所述触控层以及所述基板之间的封装层，所述封装层设置于所述反光层靠近所述基板的一侧。
  15. 根据权利要求1至10任意一项所述的显示面板，其中，所述基板包括衬底以及器件层，所述器件层包括多个阵列分布的像素驱动电路，每个所述像素驱动电路与至少一个所述子像素单元电连接。
  16. 一种显示装置，包括如权利要求1至15任意一项所述的显示面板。
PCT/CN2022/120643 2021-12-16 2022-09-22 显示面板以及显示装置 WO2023109239A1 (zh)

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